Viagra (Sildenafil) was the First ED treatment, which came to market in 1998.
Viagra pills should be taken an hour before sexual activity on an empty stomach, as the food can slow down the release of the Sildenafil into the bloodstream. Viagra generally takes about thirty minutes to fully work after which an erection can be sustained for three to four hours. Viagra is not intended to be a drug which is ingested every day, and it is recommended that the patient allow for at least 24 hours before taking another Viagra dosage. Although there have not been any conclusive reports of a Viagra overdose to-date, there could be side effects when the drug is taken too often. If you ever experience any serious side effects from taking Viagra, discontinue usage immediately and seek medical assistance promptly.
Viagra is not for everybody. There are some conditions that may prevent you from being able to take this ED drug. Viagra is only intended to treat adult males suffering from erectile dysfunction. Anybody who has been diagnosed with heart disease or is taking any form of a drug called nitrates, or alpha-blockers should consult with their doctor before buying Viagra. As well as anyone who has a history of heart problems, low blood pressure or other circulatory issues