Interferon (cont.)

Pharmacy Author:
Medical and Pharmacy Editor:

What are the available interferons?

  • interferon alfa-2a (Roferon-A)
  • interferon alfa-2b (Intron-A )
  • interferon alfa-n3 (Alferon-N)
  • peginterferon alfa-2b (PegIntron , Sylatron)
  • interferon beta-1a (Avonex )
  • interferon beta-1a (Rebif)
  • interferon beta-1b (Betaseron)
  • interferon beta-1b (Extavia)
  • interferon alfacon-1 (Infergen )
  • interferon gamma-1b (Actimmune )
  • peginterferon alfa-2a (Pegasys, ProClick)
  • peginterferon alfa-2a and ribavirin (Peginterferon)
  • peginterferon alfa-2b and ribavirin (PegIntron/Rebetol Combo Pack)

What are the side effects of interferons?

Common side effects of interferons (that may occur with all interferons) include flu-like symptoms following each injection such as:

These side effects vary from mild to severe and occur in up to half of all patients. The symptoms tend to diminish with repeated injections and may be managed with analgesics such as acetaminophen (Tylenol and others) and antihistamines such as diphenhydramine (Benadryl).

Tissue damage at the site of injection occurs with all of the interferons but more commonly with interferon beta-1b and pegylated interferon alfa-2b.

Other important side effects that may occur with all interferons, and that may be caused by higher doses are:

Medically Reviewed by a Doctor on 12/11/2014


Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Pill Finder Tool

Need help identifying pills and medications?
Use the pill identifier tool on RxList.


Back to Medications Index