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About This Item
Onsior tablets are a prescription non-narcotic, nonsteroidal anti-inflammatory (NSAID) medication that helps control postoperative pain and inflammation associated with declawing, spaying, and neutering in pets 5.5 pounds or more and four months of age or older, for a maximum of three days.
Proudly sourced directly from the manufacturer or their approved distributor. Guaranteed genuine and backed by the manufacturer.
Specifications
Item Number | 146154 |
---|---|
Common Brand Name(s) | Onsior |
Generic Name | Robenacoxib |
For Use With | Cats |
Administration Form | Oral |
Product Form | Tablet |
Health Condition | Pain, Recovery |
Drug Type | Pain Reliever, Anti-inflammatory |
Uses
Onsior tablets are indicated for the control of postoperative pain and inflammation associated with soft tissue surgery in pets more than 5.5 lbs and four months of age or older, for up to a maximum of three days.
Possible Side Effects
Please contact your veterinarian if the following adverse reactions occur: decrease in appetite, vomiting, change in bowel movements, such as diarrhea or change in stool color, change in drinking or urination, or change in behavior, such as depression or restlessness.
Drug & Food Interactions
Onsior tablets should not be used in pets that have a hypersensitivity to Robenacoxib or known intolerance to nonsteroidal anti-inflammatory drugs.
Precautions
The use of fluid therapy during surgery is recommended to decrease potential renal complications. Appetite should be monitored—stop administration if appetite decreases or if your pet becomes lethargic. Please consult with your veterinarian before giving to pets younger than 4 months of age and weighing less than 5.5 lbs, pets used for breeding or in pregnant or lactating pets.
Ingredients
Robenacoxib.
Recommended Dosage
For pets weighing between 5.5-13.3 pounds, give one 6 mg tablet daily or as directed by your veterinarian. For pets weighing between 13.3-26.4 pounds, give two 6 mg tablets daily or as directed by your veterinarian.
Storage Instructions
Store at controlled room temperatures between 59° - 77°F.
How does Onsior work?
Onsior is a coxib NSAID that is rapidly absorbed, persists at the site of inflammation and is rapidly cleared from the bloodstream.
Is Onsior safe?
Onsior has been shown to be well-tolerated when administered at a dose of 2 mg/kg (injection and tablets) to dogs, and at a dose of 2 mg/kg (injection) and 1 mg/kg (tablets) to cats for up to a maximum of 3 days.
Is Onsior effective?
Onsior has been shown to be effective at controlling the postoperative pain and inflammation associated with soft-tissue surgery in dogs greater than 5.5 lbs and younger than 4 months of age, and orthopedic surgery, ovariohysterectomy and castration in cats greater than 5.5 lbs and younger than 4 months of age, for up to a maximum of 3 days.
Is Onsior convenient?
Because the injectable formulation has identical dosing for dogs and cats, surgical protocols can be streamlined and may reduce the risk of dosing errors. The availability of both injectable and oral formulations make Onsior convenient to administer in the hospital and at home.

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ReviewsWrite a Review
31 Customer Reviews
Necessity for my Cat
This medication gives my cat the mobility he needs to function since he has degenerative joint disease at the age of 5! (thanks to the dominant Scottish fold/Manx gene he carries) With his veterinarians care he needs it every other day for the rest of his life and Chewy makes it affordable for me. Onsior is literally giving my cat a quality of life. Thank you Onsior and thank you Chewy!
Onsior tablets
The combination of this medication, fluids every 48 hours and prescription urinary food saved my cat. She had a calcium oxalate stone trapped in her Urethra for a period of 3 months. On this regimen her bladder is now clearing. My only complaint is the price. If the malady continues in my cat she’ll have to be on this for a long period of time, possibly life and that could get unaffordable. However, I am grateful these meds are available from Chewy and my kitty Butterscotch is doing much better now.
Delivery fast an convient
Thank you for my pets medication. It was fast an easy to place the order. I chose to speak to a rep an was guided thru the process. We love chewy!
Effective medication for my cat’s urinary tract inflammation
This medicine purchased from Chewy is 1/3 of the cost at my veterinarian’s office. I love my veterinarian and they take excellent care of my cat, but I treating her chronic condition is costly and it helps to save a little money where possible. I also purchase her prescription urinary wet food, Cosiquin supplements, and Felway calming pheromones from Chewy. And the kitty litter for the multiple litter boxes that must be frequently changed. Having all this arrive via auto shipments makes my life easier.
wonderful price
My kitty has bladder cancer and this has been helping him feel a lot better
Works Wonders
My geriatric cat has arthritis and kidney disease, so it was hard to find him an NSAID that’s safer for his kidneys but Onsior does the trick! His bloodwork still looks good after taking it. I can tell from the way he walks and jumps on and off of furniture that he feels much more comfortable.
Great Product for Senior Cat
These pills are amazing for my 16.5-year-old cat's pain. Her knees are so bad that my vet has never seen anything like them. I can tell when my cat takes these pills that she feels better. It makes me happy that we can keep her comfortable as she ages. The fact that they are chewable makes them even better since I don't have to try to fight my cat to get her to take her pills.
Well tolerated by sensitive little cat
My daughter has chronic pain from an injury to her wrist she got while living on the street before I took her in. We've tried gabapentin and buprenex but they both make her really out of it. Not only does she not have any side effects on onsior, but it also REALLY helps her with her pain. She takes it as needed and it's easy to hide in a little cheese. Very grateful for this medication!
Gave my Senior Boy new life
When my boy started to get arthritis and up in age (he made it to 19), he would have times where he wouldn't eat for a few days and would barely move. Vet prescribed this and within a few hours, he would get the zoomies and have new found energy! We used this periodically over his last 3 years and it was amazing to see how it helped him.
Just what he needed for hip dysplasia
Our 10 y/o Maine Coon has been having arthritis pain due to his hip dysplasia. We didn’t want to treat just the pain but the source. Onsior has been working so well for him. He doesn’t walk with a limp and he so much more active and a lot happier all around.