Onsior for Cats 6 mg, 30 Tablets - [Pain & Inflammation Relief]

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Onsior (Robenacoxib) Tablets for Cats are a fast-acting, veterinarian-recommended nonsteroidal anti-inflammatory drug (NSAID) designed to manage acute pain and inflammation following soft-tissue or orthopedic surgery in cats. With targeted action and selective COX-2 inhibition, Onsior provides effective pain relief while minimizing gastrointestinal side effects.

Key Benefits of Onsior for Cats:

• 24-Hour Pain Relief: A single dose provides fast and long-lasting pain relief for up to 24 hours.
• Post-Surgical Support: Helps manage pain and inflammation after soft-tissue and orthopedic surgeries such as spaying, neutering, and fracture repair.
• Palatable Tablet: Flavored tablets are easy to administer and well-accepted by cats.
• Veterinarian Approved: Trusted and prescribed by veterinarians for short-term pain management in cats.
• Convenient Packaging: Comes in easy-to-use 3-pack blister packets, ideal for post-op recovery.

How Onsior Works:

Onsior contains robenacoxib, a non-steroidal anti-inflammatory drug (NSAID) that specifically targets the COX-2 enzyme responsible for pain and inflammation. Unlike traditional NSAIDs, it spares the COX-1 enzyme, which helps maintain healthy stomach lining and platelet function. The medication is rapidly absorbed into the bloodstream and begins acting quickly, offering targeted relief with fewer gastrointestinal side effects.

Indications for Use:

• Onsior Injection: Indicated for the control of postoperative pain and inflammation in cats ≥ 4 months of age following orthopedic surgery, ovariohysterectomy, or castration. Use for up to 3 days.
• Onsior Tablets for Cats: Indicated for the control of postoperative pain and inflammation in cats weighing ≥ 5.5 lbs (2.5 kg) and aged ≥ 4 months. Use for up to 3 days following surgery.

Always administer Onsior exactly as prescribed by your veterinarian. Not for long-term use. Monitor your cat for any signs of adverse reactions during treatment.

Onsior Ingredients

Note: These ingredients are based on the official labeling of Onsior 6 mg tablets for cats. The formulation is designed for effective pain relief with minimal gastrointestinal impact. Always use as directed by a veterinarian.

View Onsior Drug Facts Sheet (PDF)

Important: Always provide the "Information for Cat Owners" sheet when dispensing Onsior. Weigh the benefits and risks before prescribing. Use the lowest effective dose for the shortest duration necessary.

Onsior Dosage Guidelines for Cats

The recommended dosage of Onsior tablets is 0.45 mg/lb (1 mg/kg) orally once daily for up to 3 days. Tablets are not scored and should not be split. For cats ≥ 5.5 lbs and ≥ 4 months of age only.

Note: Do not use in cats under 5.5 lbs. The first dose should be given approximately 30 minutes before surgery, concurrent with pre-anesthesia. Tablets can be given with or without food. Oral and injectable Onsior may be used interchangeably (1 dose/day for up to 3 days).

Contraindications

Do not use in cats with known hypersensitivity to robenacoxib or intolerance to other NSAIDs.

Warnings

• For veterinary use in cats only. Not for use in humans. Keep out of reach of children.
• Conduct a full health evaluation and lab tests before NSAID use.
• Do not combine with other NSAIDs or corticosteroids.
• Dispense with "Information for Cat Owners" sheet.
• Closely monitor for signs of toxicity: vomiting, diarrhea, lethargy, inappetence, etc.

Precautions

• Not evaluated in cats < 4 months, < 5.5 lbs, breeding, pregnant, or lactating cats.
• Use caution in cats with renal, cardiac, or hepatic conditions.
• Use intraoperative fluids to minimize renal risk.
• Do not use with nephrotoxic or QT-prolonging drugs.
• Onsior may prolong QT interval—use caution with prokinetics, antihistamines, anesthetics.
• Monitor for anorexia or behavioral changes; discontinue if symptoms occur.

Common Adverse Reactions

Based on a controlled field study with 249 cats:

*Some cats experienced more than one symptom during the trial.

Owner Advisory

Owners should be informed about potential side effects and signs of intolerance (vomiting, lethargy, dark stool, jaundice, seizures, behavioral changes). If adverse symptoms occur, discontinue use immediately and contact a veterinarian. Early recognition can reduce severity and support recovery.

Effectiveness

In a multi-site, placebo-controlled study of 249 cats undergoing surgery, Onsior tablets demonstrated significant improvement in pain relief compared to placebo (83.5% success rate vs. 53.8%). The treatment group also showed improvements in posture, incision sensitivity, and post-op behavior.

Storage Instructions

Store Onsior tablets at controlled room temperature: 59°F to 77°F (15°C – 25°C). Protect from moisture and sunlight.