What side effects may I notice from receiving Sildenafil?

Side effects that you should report to your care team as soon as possible:
-Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
-Hearing loss or ringing in ears
-Heart attack—pain or tightness in the chest, shoulders, arms, or jaw, nausea, shortness of breath, cold or clammy skin, feeling faint or lightheaded
-Heart rhythm changes—fast or irregular heartbeat, dizziness, feeling faint or lightheaded, chest pain, trouble breathing
-Low blood pressure—dizziness, feeling faint or lightheaded, blurry vision
-New or worsening shortness of breath
-Prolonged or painful erection
-Stroke—sudden numbness or weakness of the face, arm, or leg, trouble speaking, confusion, trouble walking, loss of balance or coordination, dizziness, severe headache, change in vision
-Sudden vision loss in one or both eyes
Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
-Facial flushing or redness
-Headache
-Nosebleed
-Runny or stuffy nose
-Trouble sleeping
-Upset stomach

This list may not describe all possible side effects for Sildenafil. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.