Interferon Omega, Feline Origin

What is interferon omega, feline origin?

Interferon omega, feline origin, is an immunomodulator used to treat virus-induced diseases in cats and dogs. It is used for both its anti-viral and immunomodulatory effects.

It is used off label (extra label) in veterinary medicine in North America. Many drugs are commonly prescribed for off-label use in veterinary medicine. 

“Off label” means the drug is being used in a way that has not been reviewed or approved by the U.S. Food and Drug Administration (FDA) or Health Canada. In these instances, follow your veterinarian’s directions and cautions very carefully, as they may be significantly different from those on the label.

How do I give my pet interferon omega, feline origin?

• Interferon omega, feline origin, comes in an injectable liquid form.
• Injections are given subcutaneously (under the skin) or intravenously (into the vein). The injectable form may also be given orally (by mouth). Follow your veterinarian’s directions.
• Measure liquids carefully.
• Dispose of used sharps in a designated sharps container.
• Give this medication to your pet for the entire time prescribed by your veterinarian, even if it appears that your pet is feeling better.
• The animal should not be vaccinated while receiving the medication or for some time afterward.

This medication may take several doses for effects to be seen.

What if I miss giving my pet the medication?

If you miss a dose, give it as soon as you remember, and then continue with the regular dosing schedule. However, if it is almost time for the next dose, skip the missed dose and resume the regular dosing schedule. Do not give the pet two doses at once.

Are there any potential side effects?

Interferon omega, feline origin, may cause the following side effects:

• Redness, mild pain or swelling at injection site
• Increased body temperature, tiredness
• Diarrhea, vomiting

Serious adverse reactions may occur. If any of the following signs develop, stop giving INT Interferon omega, feline origin, and contact your veterinarian immediately:

• An allergic reaction such as irregular breathing, rash, fever, puffiness and swelling around the face

Drug sensitivities can develop over time with repeated exposure. Your pet may have no reaction after the first few doses, but may develop a sensitivity later. It is important to watch for signs of an allergic reaction over the entire course of treatment.

Other side effects may occur. If you notice anything unusual, contact your veterinarian immediately. This short-acting medication should stop working within a few days, though effects may be prolonged in animals with kidney and/or liver disease.

Are there any risk factors for this medication?

DO NOT USE Interferon omega, feline origin, in:

• Animals who are allergic to any component

USE WITH CAUTION in:

• Animals who need to be vaccinated (do not vaccinate while the pet is receiving the medication or for some time afterward)

Are there any drug interactions I should be aware of?

The following medications should be used with caution when given with interferon omega, feline origin:

• Hepatotoxic drugs (e.g., lomustine, rifampin, nonsteroidal anti-inflammatory drugs [NSAIDs])
• Myelosuppressive drugs (e.g., chemotherapy agents, chlorambucil)
• Vaccines

Be sure to tell your veterinarian about any medications (including vitamins, supplements, or herbal therapies) that your pet is taking before starting any new treatment.

Is any monitoring needed with this medication?

• Baseline complete blood count (CBC) and chemistry panel are required.
• Follow your veterinarian’s directions for lab work monitoring during treatment.
• At home, monitor for any side effects such as those noted above. If any occur, stop using the medication and contact your veterinarian.

How do I store interferon omega, feline origin?

• Store the medication in the refrigerator at a temperature of 36°F–43°F (2°C–6°C).
• Protect from freezing.
• Keep medication out of reach of children and pets.

What should I do in case of emergency?

If you suspect an overdose or an adverse reaction to the medication, call your veterinary office immediately. If they are not available, follow their directions in contacting an emergency facility. Be prepared to provide information about the product and your pet’s weight and symptoms.