Medications · FAQ
What side effects can sildenafil cause?
Short answer
Sildenafil can cause headache, flushing, indigestion, a stuffy nose, dizziness, or changes in color vision. Contact your prescriber if side effects bother you. Get emergency care for an erection lasting more than four hours. Sudden loss of vision or hearing also needs immediate medical attention.
Common sildenafil side effects include headache, facial flushing, indigestion, nasal congestion, and dizziness. Some people notice blurred vision, light sensitivity, or a blue tint to their vision. Let your prescriber know if any symptom is severe, keeps happening, or affects your daily activities.
Do not drive or use machinery if you feel dizzy or have trouble seeing. Stand up slowly if you feel lightheaded. Avoid taking extra sildenafil or adding another ED medicine, since this may increase the risk of side effects.
An erection that lasts more than four hours is an emergency, even if it does not hurt. Get emergency care right away. Waiting can lead to permanent damage. Stop sildenafil and seek immediate medical attention for sudden vision loss or a sudden decrease or loss of hearing, with or without ringing or dizziness.
Call 911 for chest pain, fainting, trouble breathing, or signs of a severe allergic reaction. Tell emergency staff that you took sildenafil and when. Do not take a nitrate medicine for chest pain after sildenafil.
Sources
Written by the Verra clinical team · Medical review pending
General information, not medical advice. If you're in crisis, call or text 988.