Interferon Alfa, Human Recombinant
Also known as: Roferon-A, Intron-A, Alferon N
This medication is often used in an **'investigational' or off-label** manner in veterinary medicine. * **Expectations**: Please understand that its efficacy and safety have not been definitively established for all conditions in pets. * **Administration**: If you are giving this medication by mouth, it is usually a highly diluted liquid. Follow your veterinarian's exact dosing schedule (e.g., 7 days on, 7 days off). * **Storage**: Proper storage is critical. Keep refrigerated or frozen exactly as instructed by your veterinarian. Do not vigorously shake the solution. * **Side Effects**: Side effects are uncommon with oral use. If your pet receives injections, watch for signs of fever, lethargy, or muscle aches, and report them to your veterinarian.
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
- FeLV infection (Low dose)
- FeLV infection (High dose)
- FIV infection
- Chronic FHV-1 infections (Systemic)
- Chronic FHV-1 infections (Ophthalmic)
- Acute life-threatening FHV-1 infections in kittens
- Cutaneous T-cell lymphoma and severe cases of oral/cutaneous papillomas
- Immunostimulant for adjunctive treatment of dermatologic conditions (e.g., pododermatitis, papillomas, digital keratomas)
How it is given
Possible side effects
- Malaise
- Fever
- Allergic reactions
- Myelotoxicity (anemia, leukopenia, thrombocytopenia)
- Myalgia
- Neutralizing antibody formation (in cats, leading to loss of efficacy)
- Hepatotoxicity (reported in humans)
- Neurotoxicity (reported in humans)
- Flu-like syndrome (reported in humans)
Cautions & contraindications
- Feline Infectious Peritonitis (FIP) - low dose oral therapy is contraindicated
- Preexisting autoimmune disease
- Severe cardiac disease
- Severe pulmonary disease
- 'Brittle' diabetes
- CNS disorders
- Known hypersensitivity to the drug
- When used parenterally, carefully weigh the **risks versus benefits** in patients with preexisting autoimmune disease, severe cardiac or pulmonary disease, 'brittle' diabetes, Herpes infections, or CNS disorders. * **Pregnancy**: Safety is not established (FDA Category C). High parenteral doses in monkeys increased abortifacient activity. * **Antibody Formation**: Prolonged parenteral use in cats (3-7 weeks) often leads to neutralizing antibodies, rendering the drug ineffective.
Drug interactions
- Acyclovir: Additive or synergistic antiviral effects may occur.
- Zidovudine (AZT): Additive or synergistic antiviral effects may occur.
- Vidarabine: Increased toxicities may occur without synergistic antiviral effects.
Frequently asked questions
What is Interferon Alfa, Human Recombinant used for in pets?
This medication is often used in an **'investigational' or off-label** manner in veterinary medicine. * **Expectations**: Please understand that its efficacy and safety have not been definitively established for all conditions in pets. * **Administration**: If you are giving this medication by mouth, it is usually a highly diluted liquid. Follow your veterinarian's exact dosing schedule (e.g., 7 days on, 7 days off). * **Storage**: Proper storage is critical. Keep refrigerated or frozen exactly as instructed by your veterinarian. Do not vigorously shake the solution. * **Side Effects**: Side effects are uncommon with oral use. If your pet receives injections, watch for signs of fever, lethargy, or muscle aches, and report them to your veterinarian.
Is Interferon Alfa, Human Recombinant 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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