Answer
Levemir Penfill 100 units/ml cartridges have a shelf life of 30 months before opening and a maximum of 6 weeks during use or when carried as a spare.
Sources for this answer
- Levemir Penfill 100 units/ml solution for injection in cartridge.Novo Nordisk Limited · emc · SmPC §6.3 Shelf life · Version 1Document updated
Sources checked