ExoticRx · exoticrx.com/drugs/interferon-omega-feline
US brand names:Virbagen Omega
Interferon Omega (Feline) is dosed at 1 MU/kg SC q24h for 5 days, repeat at 14, 60, and 120 days in cats, per VIRBAGEN - Interferon Omega [UK Datasheet for Dogs and Cats]. Virbac SA; 2022. — Verified against BSAVA Small Animal Formulary, 10th Ed, Part A, p.227 (2026-08-01). — LOCATOR CONVENTION 2026-08-07: the bare 'p.227' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.211; verified by finding the drug named there. If you are holding the book, turn to p.211. — SOURCE EDITION: BSAVA Small Animal Formulary, Part A — Canine and Feline — ISBN 9781910443705, https://openlibrary.org/isbn/9781910443705. Verify against current literature before clinical use.
Feline recombinant interferon omega with antiviral, antiproliferative, and immunomodulatory activity. Species-specific, reducing antibody formation.
Transient fever and lethargy. Approved for feline use in EU/Japan. Not available in US. Species-specific so no neutralizing antibodies.
Species references:All Cat (Domestic) drugsAll Dog (Domestic) drugs
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A dog/cat sample is shown here. Cited dosing for all 2 species — reptiles, birds, pocket pets, livestock, and equine — is free on the per-species pages above. Pro adds the weight-based calculator for every species.
| Species | Route | Dose | Frequency | Evidence | Source |
|---|---|---|---|---|---|
| Cat (Domestic) | SC | 1 MU/kg | q24h for 5 days, repeat at 14, 60, and 120 days | Moderate | VIRBAGEN - Interferon Omega [UK Datasheet for Dogs and Cats]. Virbac SA; 2022. — Verified against BSAVA Small Animal Formulary, 10th Ed, Part A, p.227 (2026-08-01). — LOCATOR CONVENTION 2026-08-07: the bare 'p.227' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.211; verified by finding the drug named there. If you are holding the book, turn to p.211. — SOURCE EDITION: BSAVA Small Animal Formulary, Part A — Canine and Feline — ISBN 9781910443705, https://openlibrary.org/isbn/9781910443705 |
| Dog (Domestic) | IV | 2.5 MU/kg | q24h for 3 days | Moderate | BSAVA Small Animal Formulary 10th Ed (2020), Part A, PDF p.227 (printed p.211), Interferon omega DOSES, Dogs; corroborated by Plumb's Veterinary Drug Handbook (10th Ed 2023) PDF p.711 (printed p.684), Interferon Omega Feline Origin, DOGS — Plumb's 10th ed (held) printed p.683-684 (corpus PDF p.710-711), Interferon Omega, Feline Origin monograph, Dosages — DOGS [LOCATOR CORRECTED 2026-08-12 — the clause previously here named the Interferon Alfa, Human Recombinant monograph, a different molecule]; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — SOURCE EDITION: BSAVA Small Animal Formulary, Part A — Canine and Feline — ISBN 9781910443705, ; Plumb's Veterinary Drug Handbook — ISBN 9781394172207, |
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