What are insulin pens?
Insulin pens are pen-shaped injector devices that contain a disposable needle and either an insulin reservoir or an insulin cartridge. The devices typically hold enough insulin for a patient to self-administer several doses of insulin before the reservoir or cartridge is empty. All insulin pens are approved only for single-patient use (one device for only one patient). They are designed to be safe for one patient to use one pen multiple times with a new, fresh needle for each injection.
