NovoPen 4 is a brand name for a reusable insulin pen developed by Novo Nordisk. It is used for administering insulin to manage diabetes. The NovoPen 4 allows patients to inject precise doses of insulin with ease and convenience. It features a dial for dose setting and a button to release the insulin, making it user-friendly and accurate. The pen is compatible with various insulin cartridges and is designed for multiple-use, providing an alternative to insulin vials and syringes. The NovoPen 4 is noted for its reliability, ease of use, and precise dose delivery, which can improve adherence to insulin therapy.