Diabetes mellitus is a chronic metabolic disorder characterized by high blood glucose levels resulting from impaired insulin production or insulin resistance. The management of diabetes requires a multimodal approach, including lifestyle modifications, medication, and monitoring. In recent years, there has been a growing interest in the use of medicinal herbal plants as complementary or alternative therapies for diabetes management. This research paper aims to provide a comprehensive review of the medicinal herbal plants and allopathic drugs used in the treatment of diabetes mellitus, their mechanisms of action, and the supporting scientific evidence.