Answer
Plegridy (peginterferon beta-1a) solution for injection has a 3-year shelf life; for subcutaneous or intramuscular administration, it may be kept protected from light at up to 25°C for 30 days total, then used or discarded, and must be discarded if whether it has reached 30 days is unclear.
Sources for this answer
- Plegridy solution for injection in pre-filled pen and syringeBiogen Idec Ltd · emc · SmPC §6.3 Shelf life · Version 12Document updated
Sources checked