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Remdesivir

What is remdesivir?

Remdesivir is an antiviral medication used to treat feline infectious peritonitis (FIP).

Its use in cats is considered off label (extra label). Many drugs are commonly prescribed for off-label use in veterinary medicine. “Off label” means the drug is being used in a way that has not been reviewed or approved by the U.S. Food and Drug Administration (FDA) or Health Canada. In these instances, follow your veterinarian’s directions and cautions carefully, as they may be significantly different from those on the label.

How is remdesivir given?

This medication should take effect within 1 to 2 hours and improvement in clinical signs may be seen in as few as 2 to 5 days, with obvious improvement in 1–2 weeks.

What if I miss administering a dose of remdesivir?

If you miss a dose, give it as soon as you remember, and then continue with the regular dosing schedule. However, if it is almost time for the next dose, skip the missed dose and resume the regular dosing schedule. Do not give the pet two doses at once.

Are there any potential side effects?

Remdesivir may cause the following side effects:

Drug sensitivities can develop over time, with repeated exposure. Your cat may have no reaction after the first few doses but may develop a sensitivity later. It is important to watch for signs of an allergic reaction over the entire course of treatment.

Other side effects may occur. If you notice anything unusual, contact your veterinarian immediately. This short-acting medication should stop working within 24 hours, although effects may be longer in cats with liver or kidney disease.

Are there any risk factors for this medication?

DO NOT USE in cats who are:

USE WITH CAUTION in cats who are:

More risk factors may be revealed with increased use of the product. Consult with your veterinarian if you are concerned about its use for your cat.

Are there any drug interactions I should be aware of?

Although not proven, certain medications may interact with remdesivir, including:

It is important to tell your veterinarian about any medications (including vitamins, supplements, or herbal therapies) that your cat is taking before starting any new treatment.

Is any monitoring needed with this medication?

How do I store remdesivir?

What should I do in case of emergency?

© Copyright 2025 LifeLearn Inc. Used and/or modified with permission under license. This content written by LifeLearn Animal Health (LifeLearn Inc.) is licensed to this practice for the personal use of our clients. Any copying, printing or further distribution is prohibited without the express written consent of LifeLearn. This content does not contain all available information for any referenced medications and has not been reviewed by the FDA Center for Veterinary Medicine, or Health Canada Veterinary Drugs Directorate. This content may help answer commonly asked questions, but is not a substitute for medical advice, or a proper consultation and/or clinical examination of your pet by a veterinarian. Please contact your veterinarian if you have any questions or concerns about your pet’s health. Created on Jan 24, 2025.

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