Actrapid Hm 100Iu/ml Penfill 3 ml is used for the treatment of diabetes mellitus in both children (above two years of age) and adults. It mimic the insulin in humans, which helps your body utilize glucose (sugar) for energy. It works by ensuring rapid and consistent sugar control. It is a fast-acting form of insulin that helps lower blood sugar levels after food intake. Prevents the risk of having severe complications of diabetes. It stimulates the recovery of sugar in muscle and fat cells and thus suppresses sugar production in the liver. It may cause common side effects such as hypokalaemia (low potassium), hypoglycaemia (low blood sugar level), local injection site reactions, lipodystrophy (fat deposition under the skin), rash, and pruritus (itch skin) at the injection site.