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Ask Dr. Michael Salkin Your Own Question
Dr. Michael Salkin
Dr. Michael Salkin, Veterinarian
Category: Cat Veterinary
Satisfied Customers: 30340
Experience:  University of California at Davis graduate veterinarian with 45 years of experience.
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Our 15year old FIV+ male has cancer on s thyroid with a 3 mm

Customer Question

Our 15year old FIV+ male has cancer on his thyroid with a 3 mm mass in his spleen. He also has a small tumor on his leg and now a tiny mass (like a pimple) on his side. We are using Onsior every day and he has been on it for 2 weeks so far with great quality of life results. His kidney numbers have always been good and he is actually drinking less water since he started the drug. Our problem is that we are going away for 2 weeks and the pet sitter cannot pill him. We intended to have her crush the pill and mix it with a small amount of food, but if it tastes bad, he will not eat it. Can you suggest another drug? Also do you have any idea how long it will take for kidney failure to start after taking this drug every day?
Submitted: 1 year ago.
Category: Cat Veterinary
Expert:  Dr. Michael Salkin replied 1 year ago.

Robenacoxib (Onsior) adverse effects are GI-related (diarrhea and vomiting) rather than renal. in cats, this drug is extensively metabolized by the liver and elimination is 70% biliary and only 30% renal. No acute toxicity data is available; the only published information concerning overdosage stated that in healthy young cats...dosing for 3 consecutive days didn't produce signs of toxicity. The narcotic tramadol should be considered. It can be made into a tasty suspension by a veterinary formulating pharmacy and given orally by the caretaker or mixed into wet food. Please respond with further questions or concerns if you wish.