Sildenafil Tablets

The most common side effects of SILDENAFIL TABLETS are headache, flushing, upset stomach, and abnormal vision, but there are others. Do not take SILDENAFIL TABLETS if you take nitrates, as it may cause an unsafe drop in blood pressure. Seek immediate medical help for an erection lasting more than 4 hours. And if you experience a sudden decrease in vision or hearing, stop taking SILDENAFIL TABLETS and call your doctor right away.