Pegasys

Pegasys (peginterferon alfa-2b) is made from human proteins that help the body fight viral infections.

Pegasys is used alone or with other medicines to treat chronic hepatitis C in adults and children at least 5 years old.

Pegasys is also used to treat chronic hepatitis B when the virus begins to damage the liver in adults and children at least 3 years old.

Warnings

You should not use Pegasys if you have liver failure or autoimmune hepatitis.

You should not use Pegasys with ribavirin if you are pregnant, or if you are a man whose sex partner is pregnant. Use effective birth control to prevent pregnancy while taking ribavirin and for at least 6 months after your last dose.

Pegasys may cause serious or fatal side effects.