Viagra is the most popular and efficient medicine used to treat ED (erectile dysfunction). ED symptoms can range from complete inability to get an erection to maintaining it for a very short period of time. The following symptoms are serious if experienced during sexual activity – numbness or tingling, nausea, dizziness, pain in your arms, neck, jaw, or chest. Stop having sex and call your doctor right away. Viagra must not be taken more often than one time a day. If you are taking this medicine you are unlikely to be on a dosing schedule. If your erection lasts longer than 4 hours and is painful this may be a serious side effect of taking this drug called priapism. You need to seek immediate medical assistance.

Viagra’s side effects include headache, stuffy nose, memory problems, back pain, upset stomach or warmth in your face, neck and chest. In order for this medicine to work certain sexual stimulation should occur. The symptoms of Viagra overdose include nausea, chest pain, heartbeat, lightheadedness, fainting and irregular heartbeat. If you experience these symptoms seek emergency medical help. Such drugs as alprostadil and yohimbine (for impotence) can worsen some of the side effects you may experience.