Vet Guide to Banamine® (Flunixin Meglumine) in 2025 🐾

Hi, I’m Dr Duncan Houston, BVSc, founder of Ask A Vet. In this extensive 2025 guide, we explore Banamine®—the brand name for flunixin meglumine—a powerful NSAID used off-label in dogs and cats. Learn how it works, when it’s used, correct dosing, side effects, interactions, monitoring, and veterinary-quality care advice. Let’s begin! 🐶🐱

📘 What Is Flunixin (Banamine®)?

Flunixin meglumine is a non-selective **NSAID** that blocks COX‑1 and COX‑2 enzymes, reducing inflammation, pain, fever, and endotoxin effects :contentReference[oaicite:3]{index=3}.

✅ Off‑Label Uses in Dogs & Cats

• Acute musculoskeletal pain and arthritis :contentReference[oaicite:4]{index=4}
• Fever reduction
• Endotoxic or septic shock management :contentReference[oaicite:5]{index=5}
• Pre‑ and post‑operative analgesia
• Topical relief for acral lick dermatitis :contentReference[oaicite:6]{index=6}

📐 Dosing & Administration

🐶 Dogs

• IV: **0.5–2.2 mg/kg once daily**, typically ≤3 days :contentReference[oaicite:7]{index=7}
• For severe pain: **0.25–0.5 mg/kg IV q12 h for 1–3 treatments** :contentReference[oaicite:8]{index=8}
• Topical for lick-dermatitis: mix 3 mL with Synotic® and apply 2–3× daily :contentReference[oaicite:9]{index=9}

🐱 Cats

• IV: **0.25 mg/kg once or every 24 hrs**, max 2 doses :contentReference[oaicite:10]{index=10}
• Caution: severe GI toxicity at higher doses in adult cats :contentReference[oaicite:11]{index=11}

⏱️ Onset & Duration

Results are fast—IV effect in ~15 minutes, IM in 1–2 hours; duration lasts ~12 hours with dosing every 24 hrs :contentReference[oaicite:12]{index=12}.

⚠️ Side Effects & Precautions

Common (in dogs & cats):

• Vomiting, diarrhea, lethargy, anorexia :contentReference[oaicite:13]{index=13}
• GI and colonic ulcers, especially with prolonged use :contentReference[oaicite:14]{index=14}
• Renal damage if dehydrated or combined with other risk factors :contentReference[oaicite:15]{index=15}

Serious / Life‑Threatening:

• GI perforation, acute kidney injury :contentReference[oaicite:16]{index=16}
• Severe GI lesions in adult cats—high risk at 1 mg/kg s.c. daily :contentReference[oaicite:17]{index=17}
• Anaphylactoid reactions (rare)

🔗 Drug Interactions

• **Avoid other NSAIDs or corticosteroids**—increased ulcer/kidney risk :contentReference[oaicite:18]{index=18}
• Caution when combined with ACE inhibitors, diuretics, aminoglycosides (gentamicin), warfarin :contentReference[oaicite:19]{index=19}

🩺 Monitoring & Follow‑Up

• Limit use to ≤3 days and monitor hydration, QT, appetite, stool
• Check kidney and liver enzymes if prolonged therapy considered
• GI protectants (e.g. famotidine) may be advised during or after NSAID therapy

🚨 Missed Dose or Overdose?

If a dose is missed, continue next day; do **not** double dose. Signs of overdose include anorexia, vomiting, melena, collapse—seek emergency vet and Poison Helpline immediately :contentReference[oaicite:20]{index=20}.

🏡 Real‑World Scenarios

🐶 Dog with Acute Arthritis

• Administer 1 mg/kg IV once daily for 2–3 days with hydration support
• Provide pain assessment; switch to safer chronic NSAID like meloxicam for maintenance

🐱 Cat with Fever & Shock

• Give 0.25 mg/kg IV q24 h × 2 doses alongside fluid therapy
• Monitor stool, kidney values, and appetite—discontinue if signs of GI upset appear

❓ Frequently Asked Questions

Can I give Banamine® paste or injectable to my pet?

Only use formulations prescribed by your vet for small animals. Equine or bovine products are not suitable due to dosing strength and excipients.

Is Banamine better than meloxicam or carprofen?

Banamine acts faster and is more potent but carries higher risk. Use is typically short-term, with safer NSAIDs preferred for chronic management.

Why is it risky in cats?

Cats are especially prone to GI and renal damage even at low doses—must be used rarely and strictly monitored :contentReference[oaicite:21]{index=21}.

📌 Final Takeaways

• Banamine® is a powerful NSAID used off-label in dogs & rarely cats for acute inflammation, pain, fever, or shock support.
• Dosing is **0.5–2.2 mg/kg IV daily in dogs**, and **0.25 mg/kg IV once or daily (max 2 doses) in cats**.
• Monitor for GI, kidney, and hydration status; do not combine other NSAIDs or steroids.
• Limit therapy to ≤3 days; follow with protective measures and switch to safer alternatives for long-term use.
• Avoid off-label formulations—use only vet-prescribed medication suitable for small animals.

Need help with Banamine® therapy or planning safe pain management for your pet? Download the Ask A Vet app for expert guidance, tailored dosing plans, and 24/7 veterinary support. Your pet’s comfort is our priority! 🐾❤️