Oseltamivir
Also known as: Tamiflu
- **Experimental Use:** If prescribed for your pet (such as for parvovirus), understand that this is an experimental, "off-label" use of a human medication. - **Administration:** It is crucial to give this medication exactly as prescribed. If your pet is vomiting, your veterinarian may recommend giving an anti-nausea injection about 30 minutes before giving this oral medication to help them keep it down. - **Side Effects:** The most common side effect is mild stomach upset (nausea or vomiting). Giving the medication with a small amount of food may help reduce this. - **Public Health:** This drug is the same as human Tamiflu®. Its use in pets is controversial because it is an important drug for human flu pandemics.
Dosage must be set by your veterinarian for your specific pet. Never give human medication or another pet’s prescription without veterinary guidance.
What it is used for
- Treatment of equine Influenza A
- Adjunctive treatment of canine parvovirus enteritis
- Adjunctive treatment of canine parvovirus enteritis
How it is given
Possible side effects
- Gastrointestinal upset (nausea, vomiting - usually transient)
- Insomnia (reported in humans)
- Vertigo (reported in humans)
Cautions & contraindications
- Known hypersensitivity to oseltamivir
- Poultry (chickens, turkeys, ducks) - FDA banned for extra-label use
- > **Public Health & Ethical Considerations:** Routine use in dogs and cats is discouraged to prevent viral resistance and preserve human stockpiles for pandemic influenza. - **Timing:** For true influenza infections, treatment must begin as early as possible (ideally within 40-48 hours of clinical signs onset) to be effective. - **Renal Impairment:** Dosages may need adjustment in patients with severe renal insufficiency, as the active metabolite is primarily renally excreted. - **Neonatal Toxicity:** High doses in neonatal rats showed significant accumulation in the brain compared to adults. Use with extreme caution in newborn puppies or kittens due to potential **neurotoxicity**. - **Pregnancy:** FDA Category C. Minor skeletal abnormalities noted in high-dose rabbit studies. Use only if benefits outweigh risks.
Drug interactions
- Probenecid: May increase 2-fold the exposure to oseltamivir carboxylate (active metabolite) by reducing renal tubular secretion.
- Vaccines, influenza (live): May potentially reduce the immune response to live influenza virus vaccines. No effect on inactivated (killed) vaccines.
Frequently asked questions
What is Oseltamivir used for in pets?
- **Experimental Use:** If prescribed for your pet (such as for parvovirus), understand that this is an experimental, "off-label" use of a human medication. - **Administration:** It is crucial to give this medication exactly as prescribed. If your pet is vomiting, your veterinarian may recommend giving an anti-nausea injection about 30 minutes before giving this oral medication to help them keep it down. - **Side Effects:** The most common side effect is mild stomach upset (nausea or vomiting). Giving the medication with a small amount of food may help reduce this. - **Public Health:** This drug is the same as human Tamiflu®. Its use in pets is controversial because it is an important drug for human flu pandemics.
Is Oseltamivir safe for my pet?
Dosage must be set by your veterinarian for your specific pet. Never give human medication or another pet’s prescription without veterinary guidance.
This article is for general education and is not a substitute for professional veterinary advice. If your pet is unwell, please consult a veterinarian.
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