Viagra (sildenafil) is a phosphodiesterase-5 (PDE5) inhibitor used for the treatment of erectile dysfunction. Side effects of Viagra include:
- warmth or redness in the face, neck, or chest
- stuffy nose
- headaches
- stomach pain
- upset stomach
- nausea
- diarrhea
- memory problems
- back pain
- an inability to differentiate between the colors green and blue
- loss of hearing
- ringing in the ears
- and dizziness
The recommended dose of Viagra is 25-100 mg taken 30 minutes to 4 hours before sexual activity. Viagra may interact with similar medications [such as avanafil (Stendra), tadalafil (Cialis) or vardenafil (Levitra)], bosentan, cimetidine, conivaptan, imatinib, isoniazid, antidepressants, antibiotics, antifungals, drugs to treat high blood pressure or a prostate disorder, heart or blood pressure medications, hepatitis C medications, or HIV/AIDS medicines. Tell your doctor all medications and supplements you use. Viagra is intended for use in men, and is unlikely to be used in women who are pregnant or breastfeeding. However, Viagra is not expected to be harmful to a fetus. Tell your doctor if you are pregnant or plan to become pregnant during treatment with Viagra. It is unknown if Viagra passes into breast milk or if it could harm a nursing baby. Consult your doctor before breastfeeding.
Our Viagra Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.