Peginterferon alfa-2a is made from human proteins that help the body fight viral infections.
Peginterferon alfa-2a is used to treat chronic hepatitis B or C. Peginterferon alfa-2a is often
used together with another medication called ribavirin (Copegus, Rebetol, RibaPak, Ribasphere,
RibaTab).
Peginterferon alfa-2a may also be used for other purposes not listed in this medication guide.