Regular insulin is a prescription medication used for the treatment of diabetes mellitus. It is a type of insulin designed to closely mimic the insulin produced by the pancreas. Insulin helps control blood sugar levels in individuals with diabetes by facilitating the uptake of glucose into cells, where it can be used for energy or stored.
Insulin is available under brand names such as Humulin R and Novolin R, and generic versions are also available.
This medication is administered via injection. Certain formulations are only available via prescription, meaning you must have a written prescription from a licensed healthcare provider to purchase it. Novolin R is available over the counter at most pharmacies.