Insulin syringes are specialized medical devices used to inject insulin, a hormone that helps regulate blood sugar levels in people with diabetes. These syringes typically have a fine needle and a graduated barrel, allowing for precise measurement and delivery of insulin doses. They come in various sizes, often ranging from 0.3 mL to 1 mL, depending on the user's needs. Using an insulin syringe involves drawing the prescribed amount of insulin from a vial and then injecting it subcutaneously, usually in the abdomen or thigh. Proper disposal of used syringes is essential to prevent needle-stick injuries and ensure safety.