Amoxicillin-Clavulanate for Pigs: Uses, Dosing & Side Effects

This information is for educational purposes only. Never give your pet any medication without your veterinarian's guidance. Dosing, frequency, and safety depend on your pet's specific health profile.

Amoxicillin-clavulanate is a prescription antibiotic combination. It pairs amoxicillin, a penicillin-type drug, with clavulanate, which helps protect amoxicillin from some bacterial enzymes that would otherwise break it down. That combination can broaden activity against certain bacteria compared with amoxicillin alone. In veterinary medicine, it is commonly known by the brand name Clavamox in small animals. [1][2]

In pigs, this medication is usually considered extra-label in the United States, meaning your vet may prescribe it under a valid veterinarian-client-patient relationship when it is medically appropriate and legal to do so. That matters because pigs are a food-producing species, even when kept as pets, so your vet must also consider residue avoidance and any needed withdrawal interval before the animal or its products could enter the food chain. [3][4]

For pet pigs, your vet may choose amoxicillin-clavulanate when they want an oral antibiotic option for a bacterial infection that is likely to respond to a penicillin-class drug, especially if beta-lactamase-producing bacteria are a concern. It is not effective against viruses, and it should not be started without veterinary guidance, because the right antibiotic depends on the infection site, likely bacteria, and the pig's age, weight, hydration, and overall health.

Your vet may use amoxicillin-clavulanate for susceptible bacterial infections in pigs, especially infections involving the skin, soft tissues, mouth, wounds, and sometimes the respiratory or urinary tract when exam findings or culture results support that choice. In companion animals, this drug is widely used for skin, soft tissue, and periodontal infections, and those same antibacterial properties are why a veterinarian may consider it for an individual pig. [1]

In pet pigs, common real-world situations may include an infected bite wound, draining skin lesion, facial swelling related to dental disease, or a localized soft tissue infection after trauma. Some veterinarians may also consider it for selected respiratory infections, but antibiotic choice in pigs often depends on the likely organism, herd or household history, and whether the pig is still eating and drinking well enough for oral medication to work reliably.

This medication is not a one-size-fits-all antibiotic. Some swine respiratory and enteric diseases are better treated with other drugs, and oral treatment may be less reliable in pigs that are not eating or drinking normally. If your pig is lethargic, feverish, breathing hard, or worsening quickly, your vet may recommend diagnostics such as a culture, imaging, or a different treatment plan instead of relying on this medication alone. [5]

Only your vet should determine the dose for a pig. Published veterinary references for miniature pigs list many antimicrobials, but amoxicillin-clavulanate is not a standard labeled swine product in the U.S., so dosing is typically based on extra-label veterinary judgment, the infection being treated, and the exact formulation used. A commonly cited veterinary reference range for pet pigs is about 11-13 mg/kg by mouth every 12 hours, though some clinicians may adjust frequency, duration, or total mg/kg based on the case. [5][6]

Because products come in different strengths and the label may express the dose as the combined product rather than the amoxicillin portion alone, it is easy to make a math error. Your vet should tell you the exact milliliters or tablet fraction per dose, how often to give it, and how many days to continue. VCA notes that tablets and liquid suspension are given by mouth, the liquid should be shaken well, and the medication is often given with food to reduce stomach upset. [1]

Do not stop early because your pig seems better after a day or two. Stopping too soon can allow infection to flare back up. If you miss a dose, give it when you remember unless it is almost time for the next one; then skip the missed dose and return to the regular schedule. Do not double up doses. [1]

For pigs, there is one more important layer: food safety. If your pig could ever enter the food chain, your vet must establish an appropriate withdrawal interval for any extra-label use. Pet parents should never guess at this on their own. [3][4]

The most common side effects are digestive upset, including vomiting, diarrhea, and reduced appetite. These effects are often mild and may improve when the medication is given with food, but ongoing vomiting, worsening diarrhea, or refusal to eat should prompt a call to your vet. [1]

Like other penicillin-type drugs, amoxicillin-clavulanate can also cause an allergic reaction. Rare but urgent signs include facial swelling, hives or rash, fever, or trouble breathing. VCA also notes that drug sensitivities can develop over time, so a pig that tolerated earlier doses could still react later in the course. [1]

In a pig, side effects matter for another reason: dehydration can develop quickly if diarrhea or vomiting is significant, especially in young, small, or already sick animals. If your pig becomes weak, stops eating, seems painful, or has worsening respiratory signs while on treatment, your vet may want to recheck the diagnosis, change medications, or add supportive care.

Tell your vet right away if your pig has a known history of penicillin allergy, kidney disease, or liver disease, because those factors may affect how closely the medication is monitored or whether another antibiotic is a better fit. [1]

Amoxicillin-clavulanate can interact with other medications, so your vet should review everything your pig receives, including supplements, compounded drugs, and any leftover medications from another animal. VCA lists chloramphenicol, erythromycin, tetracyclines, pentoxifylline, and cephalosporins among drugs that should be used with caution alongside amoxicillin-clavulanate. [1]

Some of these interactions are practical rather than dramatic. For example, certain antibiotics may interfere with how well penicillin-class drugs work when used together, while combining multiple antibiotics can also make it harder to tell which drug is causing diarrhea or appetite loss. Your vet may still use more than one medication at the same time, but they may adjust the plan or monitor more closely. [1]

It is also important to discuss probiotics, anti-inflammatories, and any recent antibiotic exposure. Prior antibiotic use can change which bacteria are most likely and whether resistance is a concern. If your pig is being treated as a food animal or could enter the food supply, your vet also has to consider legal extra-label use rules and withdrawal planning when combining drugs. [3]