Cat · Felis catus · typical adult weight 2.50–7.00 kg
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).. Interferon Omega (Feline) is used in cats for FeLV/FIV/FIP antiviral immunotherapy. Routes documented in cats: SC. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Interferon Omega (Feline) in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Virbagen Omega
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| SC | 1 MU/kg | q24h for 5 days, repeat at 14, 60, and 120 days | Protocol: days 0-4, 14-18, 60-64, 120-124 | FeLV/FIV/FIP antiviral immunotherapy | 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). |
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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-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Interferon Omega (Feline) dose range in cats, with cited source references: SC 1 MU/kg q24h for 5 days, repeat at 14, 60, and 120 days. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Interferon Omega (Feline) in cats: SC.
Cited course lengths for Interferon Omega (Feline) in cats include: Protocol: days 0-4, 14-18, 60-64, 120-124. Duration depends on the indication — match it to the specific dose rule in the table above.
Interferon Omega (Feline) is indicated in cats for: FeLV/FIV/FIP antiviral immunotherapy.
These are general warnings for Interferon Omega (Feline) across species; consult the cat dosing table above for species-specific guidance. Transient fever and lethargy. Approved for feline use in EU/Japan. Not available in US. Species-specific so no neutralizing antibodies.
Why a species-specific page? Interferon Omega (Feline) pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cats — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.