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PetDosageChart

Non-steroidal anti-inflammatory drug (NSAID) · For Cats · 20 lb

How much Onsior for a 20 lb cat?

A 20 lb cat (9.1 kg) should receive approximately 9.1 mg of Onsior per dose, given once daily (max 3 consecutive days 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.

Content reviewed by licensed veterinarians. Sourced from Plumb's Veterinary Drug Handbook and the Merck Veterinary Manual.

Dosage · 20 lb cat

Onsior dose for a 20 lb cat

Low Dose

9.1

mg

Standard

9.1

mg

Max Safe

21.8

mg

Frequency

once daily (max 3 consecutive days for cats)

Weight in kg

9.1 kg

Always confirm with your veterinarian before administering medication. These calculations are estimates based on published veterinary pharmacology references.

Other Weights

Onsior for a different size cat

FAQ · 20 lb cat

Questions about Onsior for a 20 lb cat

How much Onsior for a 20 lb cat?
A 20 lb cat should receive approximately 9.1 mg of Onsior (Robenacoxib) per dose, given once daily (max 3 consecutive days for cats). That works out to about 1.5 × 6 mg. Always confirm with your veterinarian before administering medication.
What is the safe dose range of Onsior for a 20 lb cat?
The published dose range for a 20 lb cat is roughly 9.1 mg (low) to 21.8 mg (max safe), with 9.1 mg as the typical standard dose. Frequency: once daily (max 3 consecutive days for cats).
How often can I give Onsior to a 20 lb cat?
Onsior is typically given once daily (max 3 consecutive days for cats). Do not exceed the recommended frequency without veterinary guidance.

Need a different weight?

Use the calculator on the main Onsior page for any exact weight, or read the full dosage chart and safety information.

Full Onsior dosage guide →

Sources · 09

Sources & references

The dosage information on this page is compiled from the following veterinary and pharmaceutical references:

  • Plumb's Veterinary Drug Handbook — the standard veterinary pharmacology reference used by veterinarians worldwide.
  • Merck Veterinary Manual — a trusted, peer-reviewed resource for veterinary professionals and pet owners.
  • DailyMed (FDA Drug Labels) — official FDA-approved drug labeling and prescribing information for Robenacoxib.

Read more about our methodology and how we calculate dosages.