How to Inject Insulin
Insulin is measured in "units." A new bottle of U-100 insulin, the most commonly used strength of insulin in the United States, holds 1,000 units. New insulin cartridges or prefilled pens have 300 units each, so boxes of five cartridges or prefilled pens have a total of 1,500 units. Unopened insulin should be refrigerated. Once opened, insulin may be kept at room temperature for 30 days. After 30 days it should be thrown away.
Many types of insulin are available. Your doctor will decide the best type, amount, and administration time(s) for you. If you are going to use a syringe and vial, follow the directions below. Although injecting insulin might feel awkward at first, with a little practice you'll find it takes only a few seconds.
