Peginterferon alfa-2a (Pegasys)

General information

Class/mechanism: Immune system activator; binds to human type 1 interferon, activating downstream intracellular signal transduction pathways initially mediated by the JAK/STAT pathway. Interferon α-2a activates multiple biologic effects which are not fully understood. Pegylation results in a much longer half-life compared to Interferon alfa-2a (Roferon-A).
Route: SC
Extravasation: n/a

For conciseness and simplicity, HemOnc.org currently will focus on treatment regimens and not list information such as: renal/hepatic dose adjustments, metabolism (including CYP450), excretion, monitoring parameters (although this will be considered for checklists), or manufacturer. Instead, for the most current information, please refer to your preferred pharmacopeias such as Micromedex, Lexicomp, UpToDate (courtesy of Lexicomp), or the prescribing information.

Diseases for which it is used

• Chronic myelogenous leukemia
• Essential thrombocythemia
• Hypereosinophilic syndrome
• Polycythemia vera

Patient drug information

• Peginterferon alfa-2a (Pegasys) patient drug information (UpToDate)

History of changes in FDA indication

• 10/16/2002: Initial FDA approval for the treatment of adults with chronic hepatitis C who have compensated liver disease and have not been previously treated with interferon alfa.

Also known as

• Brand name: Pegasys