Prior to being released as an effective medication to treat ED,  sildenafil (Viagra) was being investigated as a medication to treat and prevent heart disease.

Now a study published in a recent Journal of Clinical Investigation suggests that Viagra may have a protective effect on the heart muscle in cases of hypertension.  Viagra may decrease dangerous hypertrophy in heart muscle which can ultimately lead to heart failure.  The study used an animal model and further research will be needed to see if the same beneficial effect exists in humans.