There are many types of drugs used to treat ED. Each drug works differently, but they all improve sexual activity by stimulating blood flow to the penis.

The most common ED drugs belong to a group known as phosphodiesterase type 5 (PDE5) inhibitors. They block certain enzyme activity that leads to ED.

If you have certain health issues, it may not be safe for you to take ED drugs. For instance, if you have heart disease, your heart may not be healthy enough for sex.

Make sure you tell your doctor about all of the health issues you have and the medications you’re taking. This information can help your doctor decide which drug is best for you.