Medical Developments International Limited is an Australia-based healthcare company. The Company is engaged in the manufacture and distribution of a pharmaceutical drug, and medical and veterinary equipment. The Company operates through three segments: Pharmaceuticals, Medical Devices and Veterinary products. The Pharmaceuticals segment is engaged in the sale of Penthrox primarily within Australia and the United Kingdom, and some sales in New Zealand, Eastern Europe, the Middle East and South America. The Medical Devices segment is engaged in the sale of medical devices, particularly the Space Chamber and Breath-Alert PeakFlow meters, primarily within Australia and New Zealand, and some sales in Asia, Europe, the Middle East and North America. The Veterinary Products segment is engaged in the sale of veterinary products within Australia, Europe and the United States. The Company offers a range of products in the areas of pain management, and asthma and resuscitation.