Praxilene, also called naftidrofuryl oxalate, works in two ways. Firstly, it causes the blood vessels to widen. Secondly, it increases the ability of cells to expel waste products and toxins from the body. As it can increase the blood and oxygen supply to affected areas, and improve the ability of cells to remove waste, praxilene is particularly helpful in the treatment of peripheral vascular diseases, where blood flow is greatly reduced in extremities such as the hands and feet.