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Buy Onsior Online

A prescription is required for this item.
No generic alternative is available at this time.
BRAND LISTING - Onsior (Robenacoxib)
Dosage Pack Size & Price Qty
Cats 2.5-5kg (Orange) 5mg
Cats 2.5-6kg (Pink) 6mg
Dogs 10-20kg (Green) 20mg
Dogs 20-40kg (Brown) 40mg
Dogs 5-10kg (Purple) 10mg
Product description written by Dr. Eva Y. Pan, PharmD (July 27, 2021)

What is Onsior (Robenacoxib)

Onsior (Robenacoxib) is a nonsteroidal anti-inflammatory drug (NSAID) that is approved for use in cats and dogs. NSAIDs, such as Motrin, are commonly used by humans to treat pain and inflammation. However, not all NSAIDs used for humans can be safely given to pets. Onsior (Robenacoxib) is currently the only NSAID that can be used for up to 3 days in cats. Pet owners and caregivers can buy Onsior (Robenacoxib) online at a discounted price at

What is Onsior used for?

As an NSAID, Onsior is used to control pain and inflammation after cat and dog surgeries. Onsior is convenient to use because it is given once-daily. It comes as an injection or as a tablet. When used as directed, Onsior was shown to be effective in reducing pain in pets following surgical procedures.

What are the side effects of Onsior?

Potential side effects of Onsior in cats and dogs include:

  • Bruising
  • Kidney complications
  • Bleeding or infection at the surgical incision site
  • Decreased activity
  • Vomiting
  • Loss of appetite
  • Weakness

What should you know before using Onsior?

Onsior comes as tablets or as an injection. Onsior tablets for cats come as 6 mg tablets. Onsior tablets for dogs come as 10 mg, 20 mg, and 40 mg tablets. Do not use Onsior tablets for dogs in cats, as it may be difficult to give accurate doses to cats using the Onsior for dog tablets. The dose of Onsior tablets for cats is 1 mg / kg. The dose of Onsior tablets for dogs is 2 mg / kg.

Onsior should only be used for pets that are at least 5.5 lbs and 4 months old. It is dosed once daily for a maximum of 3 days. Do not use Onsior in combination with any other NSAID or corticosteroid. Serious side effects, including death, have occurred. Keep a close eye on your pet after giving them Onsior. Contact your veterinarian right away if signs of intolerance are observed. Do not give Onsior to humans.

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  • Where can I buy Onsior online?

    Pet owners or caregivers can buy Onsior online at discounted prices at

The information provided on the website is intended to facilitate awareness about healthcare products and medical conditions generally but it is not a substitute for professional medical attention or advice. You should always speak with a qualified healthcare practitioner before taking any prescription or non-prescription drug.