Flunixin Meglumine for Sheep: 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.

Flunixin meglumine is a prescription nonsteroidal anti-inflammatory drug (NSAID). Your vet may use it in sheep to help reduce pain, inflammation, and fever. It works by blocking prostaglandin production, which is part of the body pathway that drives swelling, discomfort, and elevated temperature.

In the United States, injectable flunixin products such as Banamine are FDA-approved for some other livestock species, but not specifically for sheep. That means use in sheep is generally extra-label and must be directed by your vet within a valid veterinarian-client-patient relationship. Because sheep are food animals, your vet also needs to assign an appropriate meat or milk withdrawal interval and document treatment carefully.

For many sheep, flunixin is not a stand-alone answer. It is usually part of a larger treatment plan that may also include fluids, antibiotics when indicated, wound care, lambing support, or management changes. The goal is to improve comfort while your vet addresses the underlying problem.

Your vet may consider flunixin meglumine when a sheep has painful or inflammatory conditions and needs short-term relief. Common veterinary uses include supportive care for mastitis, pneumonia with fever, lameness, trauma, post-procedure pain, difficult lambing recovery, and endotoxemia or severe systemic inflammation. In some cases, it is used to help improve comfort and appetite while other treatments start working.

Flunixin can be especially helpful when fever or inflammation is making a sheep dull, off feed, or reluctant to move. That said, it does not treat the root cause by itself. A ewe with metritis, a ram with injury, or a lamb with infection still needs a full diagnostic and treatment plan from your vet.

Because NSAIDs can also affect the stomach, kidneys, and blood flow, your vet may avoid flunixin or use it more cautiously in sheep that are dehydrated, in shock, very young, severely ill, or already receiving other anti-inflammatory drugs. The right use depends on the whole clinical picture, not only the symptom you can see.

Do not dose flunixin in sheep without your vet's instructions. In sheep, dosing is extra-label in the U.S., so the exact amount, route, and frequency should come from your vet. A commonly referenced veterinary dose range for small ruminants is about 1.1 to 2.2 mg/kg, often given once every 24 hours, usually by injection. Because most injectable products are 50 mg/mL, even small measuring errors can matter in lambs.

Your vet may choose the lower end of the range for routine pain or fever control and reserve higher dosing for selected cases. Duration is usually kept short, because NSAID risk rises with repeated dosing, dehydration, and underlying illness. In many sheep, treatment is limited to one dose or a brief course while the primary disease is addressed.

Route matters. In food animals, changing the route can change tissue residues and safety. Your vet will decide whether intravenous use is appropriate and whether another route is acceptable in your flock situation. Never combine labeled cattle directions, internet advice, and home estimates to create a sheep dose. That can increase the risk of toxicity or illegal residues in meat or milk.

The most important side effects with flunixin are the same concerns seen with other NSAIDs: stomach or intestinal irritation, ulceration, kidney injury, and reduced blood flow to vulnerable tissues. Sheep may show this as reduced appetite, depression, teeth grinding, diarrhea, dark or bloody manure, weakness, or worsening dehydration. Some animals show only vague signs at first.

Risk goes up when a sheep is dehydrated, septic, in shock, off feed, or receiving repeated doses. NSAIDs can also be harder on the kidneys when blood pressure is already low. If your sheep seems more dull after treatment, stops eating, develops diarrhea, or looks painful in a new way, contact your vet promptly.

Injection-site irritation can also happen with injectable products. Overdose or prolonged use raises the chance of serious complications. See your vet immediately if your sheep collapses, passes black or bloody stool, stops urinating normally, or becomes suddenly much weaker after receiving flunixin.

Flunixin should not usually be combined with other NSAIDs unless your vet specifically directs it. That includes drugs such as meloxicam, ketoprofen, phenylbutazone, aspirin, or other anti-inflammatory medications. Stacking NSAIDs can sharply increase the risk of gastrointestinal ulceration and kidney injury.

Your vet will also use caution if a sheep is receiving corticosteroids such as dexamethasone, because that combination can further raise ulcer risk. Extra care is also needed with drugs or situations that affect kidney perfusion or hydration, including severe diarrhea, shock, blood loss, or other medications that may stress the kidneys.

Because sheep are food animals, interaction planning is not only about side effects. It is also about residue avoidance and withdrawal timing. If your sheep is getting antibiotics, dewormers, reproductive drugs, or multiple injections at once, tell your vet everything that has been given so the treatment plan and withdrawal instructions stay accurate.