You searched for peginterferon beta-1a Did you mean? Peginterferon Alfa-2a Interferon Beta-1b Interferon Gamma-1b 1 results PEGINTERFERON BETA-1ABody system: Antineoplastic And Immunomodulating Agents Injection peginterferon beta-1a 125 microgram/0.5 mL injection, 2 x 0.5 mL pen devices peginterferon beta-1a 63 microgram/0.5 mL injection [0.5 mL pen device] (&) peginterferon beta-1a 94 microgram/0.5 mL injection [0.5 mL pen device], 1 pack