Insulin is a hormone secreted by beta cells of islets of langerhans in the pancreas. This video discusses the pharmacology of insulin, their preparations and analogues; and their complications. Timeline: 0:00 Introduction to insulin 1:34 Pharmacodynamics of insulin 4:25 Insulin Therapy 5:00 Insulin Preparations 5:45 Insulin analogues 6:57 Drug Interactions with Insulin 7:31 Complications