I sell per pen. One pen is 3 ml which has 300 iu of insulin lispro. I have a very limited amount per month.
Humalog (insulin lispro) 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. Insulin is a hormone that works by lowering levels of glucose (sugar) in the blood.