Viagra Clinical Trial

In clinical trials, Viagra was evaluated for the safety in cardiac patients. The effects of Viagra were measured in the blood flow to the heart and lungs of 14 men with severe coronary artery disease (CAD a major cause of angina and heart attacks). All of the male participants had severe CAD with at least one of the major arteries which supplies the heart with blood had closed up by 70 percent or more.

The patients were instructed to stop taking nitrate-containing drugs such as nitroglycerin, which is often used to treat angina. The research findings were published in the The New England Journal of Medicine. The usual dose of Viagra demonstrated:

1. No damaging changes to the heart's circulation in men with coronary artery disease (CAD)
2. Zero effects on blood flow to the heart or lungs, or on the heart's ability to pump blood.
3. Safe usage for patients with stable coronary artery disease who are not taking medications containing nitrates
4. In summation, Viagra has not been studied in patients with an unstable angina, who have had a recent heart attack, or who have severe high or low blood pressure. Men who are physically inactive or who are taking more than one drug for high blood pressure should be cautious when using Viagra. Regular stress tests are recommended for sedentary men because sexual activity carries a small increased risk of heart attack.