Onsior (robenacoxib) Tablets for Cats, 6-mg, 3 tablets

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About This Item

Details

  • Small, flavored tablets for the control of post operative pain and inflammation with once-daily dosing for a maximum of 3 days
  • For moderate pain and inflammation relief following orthopedic surgery and spay /neuter.
  • Help get them from hospital to home comfortably
  • First dose to be administered approximately 30 minutes prior to surgery.
  • Onsior is available by prescription only. Talk to your veterinarian to find out if Onsior is right for your cat.

Ingredients

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FAQ

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4.6
Rated 4.6 out of 5 stars
217 Ratings
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Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

78% Positive

Effectiveness

88% Positive

Ingredients

82% Positive

Long-Term Benefits

83% Positive

96 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 4 out of 5 stars
By Sarah on Nov 10, 2025

Good for pain

My 6 year old Russian blue cat was prescribed onisor 6mg for3 days after a neuter. This drug I’m guessing takes away the pain as he slept alot after but this is

My 6 year old Russian blue cat was prescribed onisor 6mg for3 days after a neuter. This drug I’m guessing takes away the pain as he slept alot after but this is his second time taking this drug- this time it was paired with anesthesia so I’m Not sure if it had a bigger effect on him? The first time around he was tired but not a zombie like this time. This medicine will dehydrate your pet so i started taking a large spoon adding water and then churu (sp?) to give him water bc he was uninterested in water and food on this medicine for 3 days. It also made him a zombie, he’d stare and be unresponsive to us calling him and this is so unlike him. Mind you he just had surgery but it was concerning 0to me ,not our vet. Just be mindful to keep them hydrated. I’ve never been happier to finish a round of medication just so he can eat/drink and get back to being like himself again. Other than that it seems to work. I’ll be reluctant next time he has to take it though.

Rated 5 out of 5 stars
By Jennifer on Nov 25, 2025

Does the trick

I have inherited an outside cat that used to be my neighbor's - long story. He is an older boy and had terrible mouth pain. After a trip to the vet, dental cleaning

I have inherited an outside cat that used to be my neighbor's - long story. He is an older boy and had terrible mouth pain. After a trip to the vet, dental cleaning and extractions he is feeling better. He still has some mouth pain from time to time and this holds him over until he is due for his Solensia injection. I crush it up and put it in a Churu and he has no clue! Works every time :)

Rated 5 out of 5 stars
By Prince on Oct 24, 2025

Onsior works a little better than any other arthritis med.

I can still hear Prince's hind legs pop and crack when he walks. He still walks on his knees. He will not let me touch them, even to trim the nails. His hind

I can still hear Prince's hind legs pop and crack when he walks. He still walks on his knees. He will not let me touch them, even to trim the nails. His hind legs are swollen, and nails are huge and thick. He does not look or act like he is hurting. However, it is getting colder out, and I can't keep the apartment warm enough to support his issues. Only time will tell if he makes it through this winter.

Rated 3 out of 5 stars
By Seth on Oct 18, 2025

Didn't see that effective for FIC

My vet suggested this for my cat who just got diagnosed with an inflamed bladder or FIC. Unfortunately, this didnt seem to provide much pain relief for him. I think

My vet suggested this for my cat who just got diagnosed with an inflamed bladder or FIC. Unfortunately, this didnt seem to provide much pain relief for him. I think it’s better suited for orthopedic issues like arthritis.

Rated 5 out of 5 stars
By Susan on Oct 12, 2025

Super fast shipping

My 15 year old cat is on hospice care for jaw bone cancer and this med is to help make him more comfortable until he gives me signs that he is ready to leave my

My 15 year old cat is on hospice care for jaw bone cancer and this med is to help make him more comfortable until he gives me signs that he is ready to leave my arms.

Rated 5 out of 5 stars
By Jane on Jan 14, 2026

Always helpful and very fast delivery.

Our cat love when the boxes come. She loves hiding in them

Our cat love when the boxes come. She loves hiding in them

Rated 5 out of 5 stars
By Karla on Dec 8, 2025

Speed of verifying the rx

Speed of verifying the rx and getting them to me. Cheaper than my vet for sure.

Speed of verifying the rx and getting them to me. Cheaper than my vet for sure.

Rated 1 out of 5 stars
By PAUL on Jan 4, 2026

Order cancelled

you cancelled my order despite receiving a vets authorization.

you cancelled my order despite receiving a vets authorization.

Rated 5 out of 5 stars
By Michelle on Nov 4, 2025

Killer customer service

Not just the item, or the price. But the customer service with chewy is just incredible. ,

Not just the item, or the price. But the customer service with chewy is just incredible. ,

Rated 5 out of 5 stars
By Lisa on Dec 23, 2025

Inflammation.

Onsior has improved Penny’s quality of life.

Onsior has improved Penny’s quality of life.