Day: July 21, 2025

NovoLog FlexPen is a fast-acting insulin that starts to work about 15 minutes after injection, peaks in about 1 hour, and keeps working for 2 to 4 hours. NovoLog FlexPen is used to improve blood sugar control in adults and children with diabetes mellitus. NovoLog FlexPen is sometimes used together with a long-acting or intermediate-acting insulin.