Tablet is a phosphodiesterase type 5 inhibitor that helps to relax as well as dilate the blood vessels in the body. It helps to increase the flow of blood in certain parts of the body. This medication can be used for treating erectile dysfunction among men. It also treats pulmonary arterial hypertension (PAH), and eventually improves the exercising capacity in men as well as women. It can be taken orally or injected in the body by your doctor. ©