Medical Developments International Ltd. engages in the manufacture and distribution of pharmaceutical drugs, medical, and veterinary equipment. It operates through the following segments: Pharmaceuticals, Medical Equipment, and Veterinary Equipment. The Pharmaceuticals segment involves the selling of Penthrox drugs. The Medical Equipment segment includes the sale of medical devices. The Veterinary Equipment segment relates to the sale of veterinary products within Australia, Europe, and Asia. The company was founded in 1971 and is headquartered in Scoresby, Australia.