Pegylated Interferon Beta 1A is used in the treatment of multiple sclerosis (MS).

Interferons are proteins that occur naturally in the immune system. Beta interferon 1A works by suppressing both inflammation and abnormal immune response to slow down disease progression in multiple sclerosis. Polyethylene glycol is added to prolong the effect of beta interferon 1A in the body.

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them