Your safety is our first priority. Learn more about key medication details, possible side effects, warnings, and other important information about sildenafil below.
Prescribing Information
Sildenafil is a phosphodiesterase type 5, or PDE5, inhibitor that may be prescribed when clinically appropriate for erectile dysfunction or other provider-determined uses.
Black Box Warning
Sildenafil does not have a boxed warning. However, it has serious contraindications and drug interactions.
Common Side Effects
Common side effects may include:
Headache
Flushing
Upset stomach
Nasal congestion
Back pain
Muscle aches
Dizziness
Diarrhea
Temporary visual changes
Important Safety Information
Do not take sildenafil if you take nitrates in any form, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, or recreational “poppers” such as amyl nitrite or butyl nitrite. Combining sildenafil with nitrates can cause a dangerous drop in blood pressure.
Do not take sildenafil with riociguat or other guanylate cyclase stimulators.
Tell your provider if you have heart disease, chest pain, low blood pressure, uncontrolled high blood pressure, stroke history, heart attack history, liver disease, kidney disease, bleeding disorders, stomach ulcers, retinitis pigmentosa, vision problems, hearing problems, or a physical deformity of the penis.
Sildenafil may cause sudden vision loss, sudden hearing loss, prolonged erection, low blood pressure, dizziness, fainting, or serious cardiovascular symptoms in certain patients.
Seek emergency medical help if you have an erection lasting more than 4 hours, chest pain, sudden vision loss, sudden hearing loss, severe dizziness, fainting, or symptoms of an allergic reaction.
To report suspected adverse reactions, contact the FDA at 1-800-FDA-1088 or visit www.fda.gov/medwatch.
