{"id":20194,"date":"2026-09-25T18:09:01","date_gmt":"2026-09-25T11:09:01","guid":{"rendered":"https:\/\/www.vietstock.org\/?p=20194"},"modified":"2026-09-25T18:09:01","modified_gmt":"2026-09-25T11:09:01","slug":"oxytetracycline-veterinary-medicine","status":"publish","type":"post","link":"https:\/\/www.vietstock.org\/en\/industry-news\/oxytetracycline-veterinary-medicine\/","title":{"rendered":"Oxytetracycline in Veterinary Medicine: Characteristics, Scope of Use, and Safety Considerations"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Oxytetracycline is an antibiotic in the tetracycline class used in veterinary medicine to treat certain bacterial infections caused by susceptible organisms in a range of animal species.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Rather than being available in only one dosage form, oxytetracycline may be formulated as soluble powders, injectable solutions, long-acting preparations, tablets, boluses, or topical products, depending on the product and market.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This variety can lead to a common mistake: assuming that all products containing oxytetracycline can be used in the same way. In practice, individual products may differ in their authorised animal species, indications, routes of administration, absorption characteristics, duration of action, and withdrawal times.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For orally administered products, effectiveness may also be affected by the mineral content of feed or drinking water. Ions such as calcium, magnesium, and iron can form complexes with tetracyclines and reduce the amount of drug absorbed through the gastrointestinal tract.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For this reason, the use of oxytetracycline should not begin with only the question, \u201cWhat diseases does this medicine treat?\u201d Several factors should be considered together:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Whether the pathogen is likely to be susceptible to tetracyclines.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Whether the product is authorised for the relevant animal species and condition.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Whether the dosage form and route of administration are appropriate.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Whether the animals are actually receiving the intended amount of medicine.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">How the withdrawal period should be managed after treatment.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Inappropriate use may reduce treatment effectiveness, increase selection pressure for antimicrobial resistance, and raise the risk of antibiotic residues in livestock products.<\/span><\/p>\n<h2><b>Before using oxytetracycline: 4 key issues to distinguish<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Rather than memorising a list of diseases or animal species, oxytetracycline can be approached through four key considerations.<\/span><\/p>\n<p><b>The right pathogen<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Oxytetracycline has a relatively broad spectrum of activity, but \u201cbroad-spectrum\u201d does not mean it can treat every infectious disease. Effectiveness depends on whether the causative bacteria remain susceptible to tetracyclines.<\/span><\/p>\n<p><b>The right formulation<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Oral, injectable, long-acting, and topical formulations are used differently. They should not be substituted for one another simply because they contain the same active ingredient.<\/span><\/p>\n<p><b>The right conditions of use<\/b><\/p>\n<p><span style=\"font-weight: 400;\">With oral administration, water or feed intake and the presence of certain minerals may affect the amount of medicine actually absorbed.<\/span><\/p>\n<p><b>The right post-treatment management<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Withdrawal time is specific to the individual product. There is no single withdrawal period that applies to all oxytetracycline products.<\/span><\/p>\n<h2><b>1. One active ingredient does not mean all oxytetracycline products are the same<\/b><\/h2>\n<figure style=\"width: 955px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.vietstock.org\/wp-content\/uploads\/2026\/09\/istockphoto-1475584667-612x612-1.jpg\" alt=\"Veterinarian examining a sample at a cattle farm\" width=\"965\" height=\"643\" \/><figcaption class=\"wp-caption-text\">Oxytetracycline products may differ in formulation, route of administration, indications, and withdrawal time.<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Oxytetracycline is a tetracycline antibiotic originally derived from <\/span><i><span style=\"font-weight: 400;\">Streptomyces rimosus<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It works by binding to the <\/span><b>30S subunit of the bacterial ribosome<\/b><span style=\"font-weight: 400;\">, thereby interfering with the protein synthesis required for bacterial growth and replication.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Oxytetracycline is primarily considered a <\/span><b>bacteriostatic antibiotic<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Its spectrum of activity may include certain:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Gram-positive bacteria.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Gram-negative bacteria.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><i><span style=\"font-weight: 400;\">Mycoplasma<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><i><span style=\"font-weight: 400;\">Chlamydia<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Rickettsia.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">However, the theoretical spectrum of activity does not mean that every strain within these groups remains susceptible.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Susceptibility may vary according to:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Bacterial species.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Bacterial strain.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Geographical area.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Individual farm.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">History of antimicrobial use.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Selection pressure within the herd or flock.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">When disease recurs, treatment fails, or a herd or flock has a history of repeated tetracycline use, sample collection, bacterial culture, and antimicrobial susceptibility testing, where feasible, may help veterinarians make a more evidence-based treatment decision.<\/span><\/p>\n<h3><b>Products labelled \u201coxytetracycline\u201d may still be very different<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">An oxytetracycline product is not defined only by the name of its active ingredient.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Other factors should also be considered:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Strength or concentration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dosage form.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Excipients.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Target species.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Indications.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Route of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Frequency of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Treatment duration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Injection-site requirements.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Withdrawal time.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For example, a long-acting injectable oxytetracycline product should not be considered equivalent to a water-soluble product simply because both contain the same active ingredient.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Likewise, the duration of action of one long-acting formulation cannot be assumed to apply to every product labelled \u201clong-acting.\u201d<\/span><\/p>\n<h2><b>2. When may oxytetracycline actually be appropriate?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Oxytetracycline should not be selected solely on the basis of a disease name or a single clinical sign.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Its use should be based on:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">An appropriate diagnosis.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The likelihood that the causative organism remains susceptible to tetracyclines.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Animal species.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Approved product indications.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Route of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Veterinary assessment.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The clinical situations below represent areas in which certain products may have approved indications. They do not mean that every oxytetracycline product is authorised for all of these conditions.<\/span><\/p>\n<h3><b>Respiratory diseases<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some oxytetracycline products may be authorised for respiratory infections caused by susceptible bacteria, such as:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain infections associated with <\/span><i><span style=\"font-weight: 400;\">Pasteurella multocida<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain cases associated with <\/span><i><span style=\"font-weight: 400;\">Mannheimia haemolytica<\/span><\/i><span style=\"font-weight: 400;\"> in cattle.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain <\/span><i><span style=\"font-weight: 400;\">Mycoplasma<\/span><\/i><span style=\"font-weight: 400;\"> infections in poultry or other species where consistent with the product indication.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain bacterial respiratory diseases in pigs.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For <\/span><b><i>Mycoplasma gallisepticum<\/i><\/b><span style=\"font-weight: 400;\"> in poultry, tetracyclines may help reduce clinical signs in some cases, but they may not completely eliminate infection or the carrier state.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Therefore, antibiotics do not replace:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Biosecurity.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Breeding flock control.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Vaccination.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Disease surveillance.<\/span><\/li>\n<\/ul>\n<h3><b>Gastrointestinal diseases<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Diarrhoea in piglets, calves, or buffalo calves is not automatically an indication for oxytetracycline.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Diarrhoea may be associated with:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Bacteria.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Viruses.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Parasites.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Nutrition.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Feed management.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Water quality.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Housing conditions.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Oxytetracycline should only be considered when there is a reasonable basis to suspect a bacterial infection caused by a susceptible organism and when the product has an appropriate indication.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Antibiotics should not be selected solely on the basis of:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Faecal colour.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Number of days of diarrhoea.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reduced feed intake.<\/span><\/li>\n<\/ul>\n<h3><b>Reproductive infections<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some products may have indications for reproductive infections caused by susceptible bacteria.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Examples may include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain postpartum uterine infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain reproductive infections in sows.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain diseases associated with <\/span><i><span style=\"font-weight: 400;\">Chlamydia abortus<\/span><\/i><span style=\"font-weight: 400;\"> in sheep or goats.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">However, not every case of:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Metritis.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Endometritis.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Abnormal vaginal discharge.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Delayed postpartum recovery.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">requires oxytetracycline.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Drug selection should take into account:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Time since parturition.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">General condition of the animal.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Suspected pathogen.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Severity of disease.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Professional diagnosis.<\/span><\/li>\n<\/ul>\n<h3><b>Skin, soft tissue, and certain foot infections<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some products may be used for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Infected wounds.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain skin infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Soft-tissue infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain cases of foot rot in cattle when consistent with the approved indication.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Infectious foot diseases should be clearly distinguished from non-infectious conditions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A broad term such as <\/span><b>\u201choof inflammation\u201d<\/b><span style=\"font-weight: 400;\"> should not be used as the sole basis for antibiotic treatment.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Conditions such as:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Laminitis.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sole ulcers.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">White line disease.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">should not automatically be assumed to be bacterial infections requiring oxytetracycline.<\/span><\/p>\n<h2><b>3. Which animal species can oxytetracycline be used in?<\/b><\/h2>\n<figure style=\"width: 758px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.vietstock.org\/wp-content\/uploads\/2026\/09\/istockphoto-1175848061-612x612-1.jpg\" alt=\"Veterinarian examining a calf at a livestock farm\" width=\"768\" height=\"512\" \/><figcaption class=\"wp-caption-text\">Oxytetracycline may be used in different animal species, but the correct product, species, and approved indication should always be considered.<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Oxytetracycline is included in veterinary products for a range of animal species, but not every formulation is authorised for every species.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In Vietnam, the <\/span><b>authorisation status of veterinary medicines<\/b><span style=\"font-weight: 400;\"> should be checked against current regulatory documents and databases, including <\/span><b>Circular No. 18\/2024\/TT-BNNPTNT<\/b><span style=\"font-weight: 400;\"> and relevant updates.<\/span><\/p>\n<h3><b>Pigs<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some products for pigs may be indicated for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Respiratory infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Gastrointestinal infections caused by susceptible bacteria.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain reproductive infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain secondary bacterial infections.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Oxytetracycline should not be used simply because pigs are coughing or have diarrhoea without first assessing the likely cause.<\/span><\/p>\n<h3><b>Poultry<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">In chickens, ducks, or Muscovy ducks, some products may be authorised for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain respiratory infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain conditions associated with <\/span><i><span style=\"font-weight: 400;\">Mycoplasma<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain infections caused by susceptible bacteria.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The production category should be checked carefully.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A product authorised for broilers should not automatically be assumed suitable for poultry producing eggs for human consumption.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If the label states:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Do not use in birds producing eggs for human consumption.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">a withdrawal period for eggs should not be independently assumed in order to use the product outside its authorised conditions.<\/span><\/p>\n<h3><b>Cattle<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some products may be authorised for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Respiratory infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain bacterial foot diseases.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain reproductive infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain systemic infections.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For lactating dairy cattle, the following should be checked separately:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Whether the product is authorised for use in lactating animals.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Indications.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Route of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Milk withdrawal time, where applicable.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">If a product is not authorised for cattle producing milk for human consumption, an off-label withdrawal period should not be independently assumed.<\/span><\/p>\n<h3><b>Sheep and goats<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Depending on the product, oxytetracycline may be indicated for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain <\/span><i><span style=\"font-weight: 400;\">Chlamydia<\/span><\/i><span style=\"font-weight: 400;\">-associated diseases.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Respiratory infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain postpartum infections.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Soft-tissue infections.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Product selection should still be based on the specific authorised indication.<\/span><\/p>\n<h3><b>Aquaculture<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">In some countries and for certain products, oxytetracycline may be authorised for use in specific aquaculture species.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">However, the scope of use varies considerably between markets.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Before use, confirm:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Product.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Aquaculture species.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Indication.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Directions for use.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Withdrawal time.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Current regulations.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Instructions from one country should not be applied directly to another market.<\/span><\/p>\n<h2><b>4. A key consideration with oral oxytetracycline: minerals may reduce absorption<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">One characteristic of tetracyclines that requires particular attention is their interaction with multivalent cations in the gastrointestinal tract.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">When oxytetracycline is administered <\/span><b>orally<\/b><span style=\"font-weight: 400;\">, absorption may be reduced when the medicine is given together with sources containing high levels of:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Calcium.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Magnesium.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Iron.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain other multivalent cations.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">These ions can form complexes with tetracyclines, reducing the amount of medicine available for absorption through the gastrointestinal tract.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This means that a dosage calculation may be correct on paper while the animals still fail to achieve the intended drug exposure if the conditions of use are inappropriate.<\/span><\/p>\n<h3><b>This interaction is mainly relevant to oral administration<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Mineral interactions should not be described in the same way for every route of administration.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Complex formation in the gastrointestinal tract is particularly relevant to oxytetracycline administered through:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Drinking water.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Feed.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain direct oral formulations.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For injectable formulations, absorption characteristics and potential interactions should be assessed according to the specific product.<\/span><\/p>\n<h3><b>Why is extra caution needed in adult ruminants?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Therapeutic oral tetracycline administration should not be treated as universally appropriate for adult ruminants.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Reasons may include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Poor absorption.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Potential effects on rumen microflora.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Digestive physiology that differs from monogastric animals.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Therefore, such use should only be considered when the product is clearly authorised for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The species.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The route of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The specific indication.<\/span><\/li>\n<\/ul>\n<h2><b>5. Oral, injectable, and long-acting formulations: the choice is not only about convenience<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Oxytetracycline is available in several dosage forms, each with different factors that need to be controlled.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Dosage form<\/b><\/td>\n<td><b>Key consideration<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Soluble powder\/oral administration<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Actual medicine intake depends on the amount of water or feed consumed<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Injectable formulation<\/span><\/td>\n<td><span style=\"font-weight: 400;\">The correct route, injection site, and product directions must be followed<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Long-acting formulation<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Do not assume one duration of action applies to all products<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Tablet or bolus<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Use only for the authorised species, product, and route<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Topical formulation<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Does not replace systemic treatment when infection is widespread or systemic disease is present<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>Soluble powders<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some products may be administered:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Through drinking water.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Through feed where permitted by the label.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This can be convenient when treating a group of animals.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">However, the amount of medicine received by each animal depends on:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Water intake.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Feed intake.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Disease status.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Access to feeders or drinkers.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Uniformity within the herd or flock.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Severely affected animals are often those that reduce feed or water intake the most. They may therefore receive less medicine than expected.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The medicine concentration should not be increased <\/span><b>without veterinary guidance<\/b><span style=\"font-weight: 400;\"> to compensate for this problem.<\/span><\/p>\n<h3><b>Injectable formulations<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some injectable products may be authorised for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Intramuscular administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Subcutaneous administration.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Not every injectable formulation should be assumed suitable for both routes.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">When administering injections, follow the product instructions regarding:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Route of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Injection site.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Maximum volume per injection site, where specified.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dosing interval.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Storage conditions.<\/span><\/li>\n<\/ul>\n<h3><b>Long-acting formulations<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some products are designed to release oxytetracycline over a longer period.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">However, the term \u201clong-acting\u201d does not represent one universal standard for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Duration of action.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dosing interval.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Withdrawal time.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">These parameters depend on the individual formulation.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The dosing schedule of one long-acting product should not be applied to another.<\/span><\/p>\n<h3><b>Tablets or boluses<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">These dosage forms may be available in some markets.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The availability of a bolus or tablet does not mean that oral tetracycline administration is generally appropriate for all large livestock species.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Particular caution is required in adult ruminants, as discussed above.<\/span><\/p>\n<h3><b>Topical formulations<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Some products may be available as:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ointments.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Topical solutions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Other externally applied products.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">They should only be used on the sites and conditions specified on the product label.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Topical treatment should not be used as a substitute for systemic treatment when an animal has a widespread infection or systemic signs of disease.<\/span><\/p>\n<h2><b>6. Why can treatment fail even when oxytetracycline has been used?<\/b><\/h2>\n<figure style=\"width: 934px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.vietstock.org\/wp-content\/uploads\/2026\/09\/istockphoto-507297288-612x612-1.jpg\" alt=\"Veterinarian examining the health condition of a calf in a livestock pen\" width=\"944\" height=\"629\" \/><figcaption class=\"wp-caption-text\">Oxytetracycline treatment may be less effective if the diagnosis is inappropriate, animals receive insufficient medicine, or bacteria have reduced susceptibility to tetracyclines.<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">When an animal does not improve as expected, the immediate conclusion should not be:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cOxytetracycline is no longer effective.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Nor should the response automatically be to:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Increase the dose.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Extend the treatment period.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Add several other antibiotics.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Keep switching antibiotics.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Treatment failure can have several possible causes.<\/span><\/p>\n<h3><b>The initial diagnosis may not have been appropriate<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">The condition may be caused by:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Viruses.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Parasites.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Nutritional factors.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Environmental disorders.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Non-infectious lesions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Multiple interacting causes.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">In these situations, oxytetracycline may not address the primary cause.<\/span><\/p>\n<h3><b>The animals may not be receiving enough medicine<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">This is particularly relevant when medicine is administered through drinking water or feed.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A sick herd or flock may:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Eat less.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Drink less.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Have uneven consumption between individuals.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">As a result, the amount of medicine actually received by each animal may differ significantly from the calculated amount.<\/span><\/p>\n<h3><b>Oral absorption may be affected<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Calcium, magnesium, iron, and certain other cations can reduce gastrointestinal absorption of tetracyclines.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This is one factor to investigate when an oral formulation is being used.<\/span><\/p>\n<h3><b>The bacteria may have reduced susceptibility or developed tetracycline resistance<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Antimicrobial resistance is another possible explanation.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This may be associated with:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Long-term selection pressure from tetracycline use.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Circulation of resistant bacteria.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Transfer of resistance genes between bacteria.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Inappropriate antimicrobial use within the herd or flock.<\/span><\/li>\n<\/ul>\n<h3><b>When should bacterial culture and antimicrobial susceptibility testing be considered?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Particularly when:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Disease recurs.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Treatment does not produce the expected response.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A previously effective regimen is becoming less effective.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The herd or flock has received multiple antibiotics.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A more evidence-based antibiotic choice is needed.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Where feasible, sample collection, bacterial culture, and antimicrobial susceptibility testing can provide additional information before treatment is changed or prolonged.<\/span><\/p>\n<h2><b>7. Situations requiring caution before using oxytetracycline<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Oxytetracycline is not appropriate for every animal or every clinical condition.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Situations requiring particular attention may include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pregnant animals.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Young animals with developing bones and teeth.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Animals with kidney disease.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Animals with severe systemic disease.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Animals receiving multiple other medicines.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cases in which the cause of disease has not yet been identified.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Tetracyclines can bind to calcium and may be deposited in developing bones, teeth, or foetal tissues.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This does not mean that oxytetracycline is absolutely contraindicated in every young or pregnant animal. However, its use should follow the product label and an appropriate veterinary benefit\u2013risk assessment.<\/span><\/p>\n<h3><b>Kidney disease<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Additional caution is required in animals with impaired renal function because elimination of certain tetracyclines may be affected.<\/span><\/p>\n<h3><b>Viral diseases<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Oxytetracycline does not directly treat viral diseases.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Using an antibiotic for a purely viral infection:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Does not act against the primary pathogen.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Creates unnecessary antimicrobial exposure.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">May contribute to selection pressure for antimicrobial resistance.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Antibiotics should only be considered where an appropriate secondary bacterial infection is present and professional assessment supports their use.<\/span><\/p>\n<h3><b>Do not combine medicines without professional guidance<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Oxytetracycline should not be independently combined with multiple antibiotics or other medicines without an appropriate professional basis.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Inappropriate combinations may:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fail to improve effectiveness.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Increase the risk of adverse reactions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Complicate assessment of treatment response.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Increase antimicrobial selection pressure.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Complicate withdrawal-time management.<\/span><\/li>\n<\/ul>\n<h2><b>8. Controlling oxytetracycline resistance starts with reducing unnecessary antimicrobial use<\/b><\/h2>\n<figure style=\"width: 758px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.vietstock.org\/wp-content\/uploads\/2026\/09\/istockphoto-1281485908-640x640-1.jpg\" alt=\"Different antibiotic medicines displayed on a medical gloved hand\" width=\"768\" height=\"432\" \/><figcaption class=\"wp-caption-text\">Controlling oxytetracycline resistance requires responsible antimicrobial use together with biosecurity and effective herd or flock health management.<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Antimicrobial resistance does not arise solely because of a single course of treatment being \u201ctoo short.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It is influenced by the broader context of:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Overall antimicrobial use.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Frequency of exposure.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Transmission of resistant bacteria.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Biosecurity.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Environment.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Herd or flock management.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Practices that may increase selection pressure include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reducing the dose to save costs.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Stopping treatment early as soon as animals appear to improve.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Extending treatment beyond product directions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Repeating an old treatment regimen without reassessing the diagnosis.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Frequently switching antibiotics.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Combining medicines without justification.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Using antibiotics as a substitute for hygiene and vaccination.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Failing to conduct antimicrobial susceptibility testing in recurrent or treatment-failure cases where testing is feasible.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Routine use of antibiotics for disease prevention in ways that do not comply with current regulations.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Under <\/span><b>Vietnam\u2019s phased roadmap<\/b><span style=\"font-weight: 400;\">, the final transitional deadline for veterinary medicines containing antibiotics authorised for disease prevention expired on <\/span><b>31 December 2025<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Therefore, oxytetracycline should not be routinely added to feed to:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Prevent disease on a scheduled basis.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u201cKeep the herd healthy.\u201d<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Compensate for poor housing conditions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Compensate for inadequate vaccination or biosecurity programmes.<\/span><\/li>\n<\/ul>\n<h3><b>Reducing antibiotic use starts with better herd and flock management<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Farms may reduce the need for treatment by improving:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hygiene.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Disinfection.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Biosecurity.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Vaccination programmes.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Stocking density.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ventilation.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Nutrition.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Water quality.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Control of incoming animals.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Early detection of abnormal animals.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The objective is not only to use oxytetracycline more appropriately, but also to <\/span><b>reduce how often the farm needs antibiotics at all<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><b>9. Residue management starts with the correct product, not only the active ingredient<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">A common question is:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cHow many days is the withdrawal period for oxytetracycline?\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">That question does not provide enough information.<\/span><\/p>\n<p><b>There is no single withdrawal time that applies to all oxytetracycline products.<\/b><\/p>\n<h3><b>First question: is the product authorised for that production group?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Before calculating a withdrawal period, check:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Is the product authorised for the species?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Is it authorised for animals producing milk?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Is it authorised for poultry producing eggs for human consumption?<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">If the label prohibits use in a particular production group, a withdrawal time should not be independently assumed in order to use the product outside its authorised conditions.<\/span><\/p>\n<h3><b>Withdrawal time is specific to each product<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">A <\/span><b>withdrawal time<\/b><span style=\"font-weight: 400;\"> is the minimum period specified for an individual product between the final administration and the point at which food derived from the treated animal may enter the food chain.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This period may apply to:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Meat.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Milk.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Eggs.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Other food products.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Withdrawal time may depend on:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Product.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Species.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dosage form.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Route of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dose.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Treatment schedule.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Type of food product being collected.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For example, a long-acting injectable product may have a different withdrawal period from a water-soluble formulation.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The withdrawal time of one product must not be applied to another simply because both contain oxytetracycline.<\/span><\/p>\n<h3><b>MRL is different from withdrawal time<\/b><\/h3>\n<p><b>MRL \u2013 Maximum Residue Limit<\/b><span style=\"font-weight: 400;\"> is the maximum permitted level of a residue in a specific food product.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">MRLs may vary according to the <\/span><b>species, tissue or food product, and applicable regulations<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In Vietnam, maximum residue limits for veterinary medicines in food are addressed under <\/span><b>Circular No. 24\/2013\/TT-BYT<\/b><span style=\"font-weight: 400;\"> of the Ministry of Health, except where a corresponding national technical regulation applies.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The distinction is important:<\/span><\/p>\n<p><b>MRL = the maximum permitted residue level in food.<\/b><\/p>\n<p><b>Withdrawal time = the period that must be observed after the final administration to help ensure that food products meet residue requirements when the medicine is used according to its authorised conditions.<\/b><\/p>\n<h2><b>10. From the start of treatment to the day of sale: an oxytetracycline control process<\/b><\/h2>\n<figure style=\"width: 728px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.vietstock.org\/wp-content\/uploads\/2026\/09\/istockphoto-2285836314-612x612-1.jpg\" alt=\"Farm worker recording cattle health and treatment information\" width=\"738\" height=\"415\" \/><figcaption class=\"wp-caption-text\">Accurate treatment records and final-dose dates help farms manage withdrawal times before animals or animal products enter the food chain.<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Instead of checking residue risk only on the day animals are sold, farms should begin managing it from the start of treatment.<\/span><\/p>\n<h3><b>Before treatment<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Check:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Correct product.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Correct species.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Correct indication.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Correct route of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Any restrictions relating to milk or eggs.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Withdrawal time stated on the label.<\/span><\/li>\n<\/ul>\n<h3><b>At the start of treatment<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Record:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Trade name of the medicine.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Active ingredient.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Product batch number where traceability is required.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Start date.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Individual animal or livestock group.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dose.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Route of administration.<\/span><\/li>\n<\/ul>\n<h3><b>During treatment<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Monitor:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Treatment response.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Water or feed intake when using oral medication.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Each administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Other medicines used at the same time.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Adverse reactions, if any.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">If the animal does not respond as expected, the dose should not be increased or treatment extended without reassessing the cause.<\/span><\/p>\n<h3><b>At the final dose<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Record accurately:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Date of the final dose.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Time, if required by the farm management system.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Withdrawal time.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Earliest permitted date for sale.<\/span><\/li>\n<\/ul>\n<h3><b>Before entering the food chain<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Check again:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Has the animal completed the withdrawal period?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Was another medicine used with a longer withdrawal time?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Is milk or egg collection still subject to withholding?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Has the treated group been correctly identified?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Are treatment records complete?<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Residue management should not depend on memory.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If the exact product or final-dose date cannot be confirmed, the information should be verified before the animal or its products enter the food chain.<\/span><\/p>\n<h2><b>11. Frequently asked questions about oxytetracycline<\/b><\/h2>\n<figure style=\"width: 886px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.vietstock.org\/wp-content\/uploads\/2026\/09\/istockphoto-1224249413-612x612-1.jpg\" alt=\"FAQ blocks beside a medicine bottle and tablets\" width=\"896\" height=\"486\" \/><figcaption class=\"wp-caption-text\">Frequently asked questions about oxytetracycline cover its veterinary uses, absorption, antimicrobial resistance, and withdrawal time.<\/figcaption><\/figure>\n<h3><b>Is oxytetracycline a broad-spectrum antibiotic?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Yes.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Oxytetracycline is considered a relatively broad-spectrum antibiotic and may act against several groups of bacteria as well as certain microorganisms such as <\/span><i><span style=\"font-weight: 400;\">Mycoplasma<\/span><\/i><span style=\"font-weight: 400;\"> and <\/span><i><span style=\"font-weight: 400;\">Chlamydia<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">However, \u201cbroad-spectrum\u201d does not mean that it:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Is effective against every bacterium.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Treats every disease.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Can be used without a diagnosis.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Makes antimicrobial susceptibility testing unnecessary when disease recurs or treatment fails.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Actual bacterial susceptibility can vary over time and between locations.<\/span><\/p>\n<h3><b>Can oxytetracycline be used in pigs, chickens, and cattle?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Potentially, depending on the <\/span><b>specific product<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Veterinary products may be registered for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pigs.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Poultry.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cattle.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sheep.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Goats.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain other species.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Each product may only be authorised for certain species, diseases, and routes of administration.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Check:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Product name.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Species.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Indication.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Route of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Directions for use.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Withdrawal time.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Milk or egg restrictions.<\/span><\/li>\n<\/ul>\n<h3><b>Why do minerals matter with oral oxytetracycline?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Oxytetracycline can form complexes with ions such as:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Calcium.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Magnesium.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Iron.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This can reduce gastrointestinal absorption.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For oral products, feed composition, water composition, and mineral supplementation may therefore need to be considered.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The method of administration should not be changed without guidance from the product label or a veterinarian.<\/span><\/p>\n<h3><b>Is the withdrawal time the same for all products?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">No.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Withdrawal time depends on:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Product.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dosage form.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Route of administration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Species.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Treatment regimen.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Type of food product.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">A long-acting formulation may have different requirements from an oral product.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Withdrawal times for meat may differ from those for milk or eggs.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If a product is not authorised for animals producing milk or eggs for human consumption, another withdrawal period should not be independently applied to justify its use.<\/span><\/p>\n<h2><b>Managing Oxytetracycline and Reducing Antibiotic Dependence at VIETSTOCK 2026<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Oxytetracycline is most effective when used for the correct indication, species, and product, and when the causative organism remains susceptible. At farm level, managing this antibiotic should also include monitoring treatment response, controlling antimicrobial resistance, recording medicine use, and complying with withdrawal times to reduce the risk of residues in livestock products.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">At <\/span><b>VIETSTOCK 2026 \u2013 Vietnam\u2019s Premier International Feed, Livestock &amp; Meat Industry Show<\/b><span style=\"font-weight: 400;\">, farmers, veterinarians, and businesses can explore products, technologies, and solutions related to animal health, veterinary medicine, and biosecurity. The event is expected to bring together more than <\/span><b>300 brands<\/b><span style=\"font-weight: 400;\">, over <\/span><b>10,000 sqm of exhibition area<\/b><span style=\"font-weight: 400;\">, and <\/span><b>13,000 trade visitors<\/b><span style=\"font-weight: 400;\"> from more than <\/span><b>40 countries and territories<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><b>At the event, participants can explore solutions that support responsible antimicrobial use and help reduce the need for antimicrobial treatment on farms, including:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Veterinary medicines and animal health solutions:<\/b><span style=\"font-weight: 400;\"> exploring products, indications, dosage forms, and appropriate use for different livestock groups.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Diagnostics and antimicrobial susceptibility testing:<\/b><span style=\"font-weight: 400;\"> accessing technologies that support pathogen identification and more informed treatment decisions when disease recurs or response is poor.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Medicine-use and residue management:<\/b><span style=\"font-weight: 400;\"> learning about solutions for recording treatment history, administration dates, and withdrawal periods before animals are sold.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Biosecurity and disease prevention:<\/b><span style=\"font-weight: 400;\"> exploring solutions for disease control, hygiene, and farm management that help reduce disease pressure and the need for antibiotics.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Nutrition and alternatives to antibiotics:<\/b><span style=\"font-weight: 400;\"> exploring approaches that support animal health and reduce reliance on antibiotics in livestock production.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">In particular, the <\/span><b>One Health Forum<\/b><span style=\"font-weight: 400;\"> on <\/span><b>22 October 2026<\/b><span style=\"font-weight: 400;\"> will include topics directly related to this issue, such as <\/span><b>practical solutions for reducing antimicrobial resistance (AMR) in livestock production, alternatives to antibiotics, and gut microbiome modulation to improve resilience and stability<\/b><span style=\"font-weight: 400;\">. The programme also places reduced dependence on antibiotics within the broader context of nutrition, farm management, biosecurity, and hygiene, making it relevant to farms seeking better disease control without excessive reliance on antimicrobial treatment.<\/span><\/p>\n<p><b>Date:<\/b><span style=\"font-weight: 400;\"> 21\u201323 October 2026<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span> <b>Venue:<\/b><span style=\"font-weight: 400;\"> Saigon Exhibition and Convention Center (SECC), 799 Nguyen Van Linh Street, Tan My Ward, Ho Chi Minh City, Vietnam<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span> <b>Event website:<\/b><a href=\"https:\/\/www.vietstock.org\/en\/\"> <span style=\"font-weight: 400;\">https:\/\/www.vietstock.org\/en\/<\/span><\/a><\/p>\n<p><span style=\"font-weight: 400;\">\ud83d\udc49<\/span><a href=\"https:\/\/www.vietstock.org\/en\/event-features\/vietstock-2026-pre-registration-is-now-open-connect-with-the-future-of-livestock-production-and-animal-health-2\/\"> <b>VIETSTOCK 2026 Visitor Registration Information<\/b><\/a><\/p>\n<p><span style=\"font-weight: 400;\">\ud83d\udc49<\/span><a href=\"https:\/\/www.vietstock.org\/en\/event-features\/one-health-forum-at-vietstock-2026-advancing-sustainable-livestock-development\/\"> <b>Learn more about the One Health Forum<\/b><\/a><\/p>\n<p><b>Contact information:<\/b><\/p>\n<p><b>Exhibiting:<\/b><span style=\"font-weight: 400;\"> Ms. Sophie Nguyen \u2013 Sophie.nguyen@informa.com<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span> <b>Visitor Support:<\/b><span style=\"font-weight: 400;\"> Ms. Phuong \u2013 Phuong.C@informa.com<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span> <b>Marcom Support:<\/b><span style=\"font-weight: 400;\"> Ms. Anita Pham \u2013 Anita.pham@informa.com<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Oxytetracycline is widely used in veterinary medicine, but its appropriate use depends on the specific product, animal species, indication and route of administration. Explore its formulations, applications, safety considerations, antimicrobial resistance and withdrawal-time management in livestock production.<\/p>\n","protected":false},"author":3,"featured_media":20195,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Oxytetracycline in Veterinary Medicine: Uses, Safety &amp; Withdrawal Time<\/title>\n<meta name=\"description\" content=\"Learn how oxytetracycline is used in veterinary medicine, including formulations, target species, safety considerations, resistance and withdrawal time.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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