What is the primary use of insulin?

Insulin is primarily used to lower blood sugar levels in individuals with diabetes. It is a hormone produced by the pancreas that allows cells in the body to take in glucose from the bloodstream to be used for energy. In people with diabetes, either the body does not produce enough insulin (as in Type 1 diabetes) or the cells do not respond effectively to insulin (as in Type 2 diabetes). By administering insulin, patients can effectively manage their blood glucose levels, preventing hyperglycemia and related complications. This vital role in glucose metabolism is what makes insulin central to diabetes treatment.

Other options, such as managing pain, controlling blood pressure, or inducing vomiting, are not functions associated with insulin. These roles are fulfilled by other medications or interventions specifically designed for those purposes.