It is used for erectile dysfunction and benign prostatic hyperplasia.
It is a phosphodiesterase (PDE-5) inhibitor. It works in erectile dysfunction by increasing blood flow to the penis by relaxing the muscles in penile blood vessels. It works in pulmonary hypertension by relaxing the blood vessels in the lungs to allow blood to flow more easily.
Stiffness, Headache, Blurred vision, Muscle pain, Indigestion, Flushing (sense of warmth in the face, ears, neck and trunk), Nosebleeds