Before taking any ED medication, tell your doctor about any preexisting health conditions you have. You should also discuss any other drugs or supplements you’re currently taking. Some ED medications can interact with other medications and cause serious side effects.
You shouldn’t take ED medications if you:
- take nitrates, which are usually prescribed for chest pain (angina)
- have low blood pressure (hypotension)
Additionally, your doctor may advise against taking ED medications if you:
- take certain other medications that may interact with the ED medication
- have uncontrolled high blood pressure (hypertension)
- have liver disease
- are on dialysis due to kidney disease
The most common side effects of ED drugs are temporary. They include:
- indigestion or upset stomach
- back pain
- muscle aches
- stuffy or runny nose
Although it’s uncommon, some ED drugs can cause a painful erection that won’t go away. This is known as priapism. If an erection lasts too long, it can damage your penis. If your erection lasts more than four hours, you should seek immediate medical attention.
Other uncommon symptoms of ED medication are changes to hearing and vision, including color vision.