What is sildenafil?
Sildenafil is a phosphodiesterase inhibitor (PDE-5) used to treat erectile dysfunction (ED). It works by increasing blood flow and oxygen to the penis, helping you more easily attain an erection. It may also be used for purposes not listed in this medication guide. Though sildenafil helps treat ED, it neither cures the condition nor increases sexual desire. Sildenafil does not protect against the spread of sexually transmitted infections (STIs) or prevent pregnancy.
Talk to your doctor about whether sildenafil may be right for you.