Description and Brand Names

Drug information provided by: Micromedex

US Brand Name

  1. Pegasys
  2. Pegasys Proclick


Peginterferon alfa-2a injection is used alone or together with other medicines, such as ribavirin (Copegus®, Rebetol®), boceprevir (Victrelis®), and telaprevir (Incivek®), to treat chronic hepatitis C infection. It is also used to treat adult patients with chronic hepatitis B infection. Peginterferon alfa-2a is a synthetic (man-made) version of a substance that is normally produced in the body. It helps your immune system fight hepatitis infections.

This medicine is available only with your doctor's prescription.

Once a medicine has been approved for marketing for a certain use, experience may show that it is also useful for other medical problems. Although these uses are not included in product labeling, peginterferon alfa-2a is used in certain patients with the following medical conditions:

  • Essential thrombocythemia (too many platelets in the blood).
  • Polycythemia vera (bone marrow disorder).

This product is available in the following dosage forms:

  • Solution