Onsior (Robenacoxib) Dosage for Cats
This dosage information is for educational purposes only. Always consult your veterinarian before giving any medication to your pet. Dosages may vary based on your pet's health conditions, other medications, and individual factors.
Dosage Calculator
Enter your cat's weight to calculate the recommended dose.
Recommended Dosage
Low Dose
—
mg
Standard Dose
—
mg
Max Dose
—
mg
Frequency
once daily (max 3 consecutive days for cats)
These calculations are estimates based on standard veterinary dosing guidelines. Always confirm with your veterinarian before administering medication.
Onsior Dosage Chart for Cats by Weight
Scroll sideways to see full table
| Weight | Low Dose | Standard Dose | Max Dose | Frequency |
|---|---|---|---|---|
| 3 lbs (1.4 kg) | 1.5mg | 1.5mg | 3.5mg | once daily (max 3 consecutive days for cats) |
| 4 lbs (1.8 kg) | 2mg | 2mg | 4.5mg (6mg tablet) | once daily (max 3 consecutive days for cats) |
| 5 lbs (2.3 kg) | 2.5mg | 2.5mg | 5.5mg (6mg tablet) | once daily (max 3 consecutive days for cats) |
| 6 lbs (2.7 kg) | 2.5mg | 2.5mg | 6.5mg (6mg tablet) | once daily (max 3 consecutive days for cats) |
| 7 lbs (3.2 kg) | 3mg | 3mg | 7.5mg | once daily (max 3 consecutive days for cats) |
| 8 lbs (3.6 kg) | 3.5mg | 3.5mg | 8.5mg | once daily (max 3 consecutive days for cats) |
| 9 lbs (4.1 kg) | 4mg | 4mg | 10mg | once daily (max 3 consecutive days for cats) |
| 10 lbs (4.5 kg) | 4.5mg (6mg tablet) | 4.5mg (6mg tablet) | 11mg (2 × 6mg) | once daily (max 3 consecutive days for cats) |
| 12 lbs (5.4 kg) | 5.5mg (6mg tablet) | 5.5mg (6mg tablet) | 13mg (2 × 6mg) | once daily (max 3 consecutive days for cats) |
| 14 lbs (6.3 kg) | 6.5mg (6mg tablet) | 6.5mg (6mg tablet) | 15mg | once daily (max 3 consecutive days for cats) |
| 16 lbs (7.3 kg) | 7.5mg | 7.5mg | 17.5mg (3 × 6mg) | once daily (max 3 consecutive days for cats) |
| 18 lbs (8.2 kg) | 8mg | 8mg | 19.5mg | once daily (max 3 consecutive days for cats) |
| 20 lbs (9.1 kg) | 9mg | 9mg | 22mg | once daily (max 3 consecutive days for cats) |
| 25 lbs (11.3 kg) | 11.5mg (2 × 6mg) | 11.5mg (2 × 6mg) | 27mg | once daily (max 3 consecutive days for cats) |
What is Onsior (Robenacoxib) used for in cats?
How to give Onsior to your cat
IMPORTANT: Onsior for cats is FDA-approved for a MAXIMUM of 3 consecutive days only. This is different from dogs, where longer courses may be used. Give without food for best absorption, at least 30 minutes before or after a meal. The tablet is small and flavored. Do not give more than 3 days without explicit veterinary authorization.
Available Forms
tablet, injectable
Give with Food?
No — can be given without food
Side effects of Onsior in cats
Common side effects
Serious side effects
- gastrointestinal ulceration
- kidney damage
- liver toxicity
- anemia
When to call the vet
Call your vet immediately if your cat shows any of these signs:
- Vomiting or blood in stool
- Loss of appetite
- Lethargy or depression
- Yellowing of gums or eyes
- Decreased urination or dark urine