Lamivudine
Also known as: Epivir, Zeffix
Lamivudine is used to help manage **FIV (Feline Immunodeficiency Virus)** in cats. It is not a cure, but it can help lower the amount of virus in your cat's body and support their immune system. * **Give exactly as prescribed**: Do not skip doses, as this can lead to viral resistance. * **Monitor for side effects**: Watch for signs of anemia or low white blood cells, such as extreme tiredness, pale gums, or unexpected infections. Contact your vet if you notice these. * **Follow-up appointments**: Your vet will need to run regular blood tests to ensure the medication is not negatively affecting your cat's bone marrow.
Dosage must be set by your veterinarian for your specific pet. Never give human medication or another pet’s prescription without veterinary guidance.
Veterinary professional? See the full dosing-by-species reference on VetSheet →
What it is used for
- Treatment of FIV-positive cats
How it is given
Possible side effects
- Cytopenias (predicted)
- Anaemia
- Leukopenia
Cautions & contraindications
- Anaemia
- Pre-existing severe bone marrow suppression
- > **Haematological monitoring is recommended** due to the predictable risk of cytopenias. Normal precautions should be observed for safety and handling of antiviral medications.
Drug interactions
- Zidovudine: Synergistic therapeutic effect; more effective at reducing viral load and increasing CD4/CD8 ratios than zidovudine alone.
Frequently asked questions
What is Lamivudine used for in pets?
Lamivudine is used to help manage FIV (Feline Immunodeficiency Virus) in cats. It is not a cure, but it can help lower the amount of virus in your cat's body and support their immune system. • Give exactly as prescribed: Do not skip doses, as this can lead to viral resistance. • Monitor for side effects: Watch for signs of anemia or low white blood cells, such as extreme tiredness, pale gums, or unexpected infections. Contact your vet if you notice these. • Follow-up appointments: Your vet will need to run regular blood tests to ensure the medication is not negatively affecting your cat's bone marrow.
Is Lamivudine 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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