•Sildenafil is a selective vasodilator that can cause severe hypotension. Sildenafil should avoided if the patient is taking nitrates for chest pain.
•Potentially serious side effects of sildenafil include hypotension, myocardial infarction, arrhythmias, hearing loss, and stroke.
•Flushing and headache are common side effects of sildenafil, but they are not serious.
•Confusion is not a known side effect of sildenafil.