Pegylated interferon

Pegylated interferon (PEG-IFN) is a class of medication that includes three different drugs as of 2012:^[1]

• Pegylated interferon-alpha-2a
• Pegylated interferon-alpha-2b
• Pegylated interferon beta-1a^[2]

In these formulations, Polyethylene glycol (PEG) is added to make interferon last longer in the body.^[3] They are used to treat both hepatitis B,^[4] hepatitis C^[1] and multiple sclerosis.^[2]

Pegylated interferon is contraindicated in patients with hyperbilirubinaemia.^{[citation needed]}