Erectile dysfunction means not being able to get and keep an erection firm enough for sexual activity. It also is called impotence. Having erection trouble from time to time isn't always a cause for concern.

Understanding the Context

But if erectile dysfunction is ongoing, it can cause stress, affect self-confidence and add to challenges with a partner. Sildenafil is used to treat erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. Erectile dysfunction (ED) affects more than thirty million Americans every year.

Key Insights

ED, or impotence, is when a person struggles to have their penis become erect or to maintain a firm erection. The ... For most men unable to obtain or sustain an erection, it can be embarrassing to even utter words—erectile dysfunction. Also known as “impotence,” erectile dysfunction (ED) is defined by the Mayo ... Erectile dysfunction (ED), commonly known as impotence, refers to the inability to achieve or maintain a firm erection during sexual activity.

Final Thoughts

While occasional difficulty isn't usually cause for ...