But it actually is a vaso-dilator, making the blood vessels open up. When there was a study if it would work with men having heart disease, the men sheepishly told their docs that they were now able to have intercourse.
(Physiology lesson: the blood vessels open up, fill the spongy area of the penis with blood, and voila, it gets hard. After orgasm, it drains out. If it doesn't drain out, it ends up clotting and the person can lose it's function: this is a side effect of some major tranquillizers).
So the UKMail has a report that they are doing a study using for pregnant women who have small babies, to see if it improves the blood flow to the kids in late pregnancy, from blood vesesle to the placenta that spasm up from pre eclampsia.
The drug has been used to save the lives of both babies and adults suffering from a condition called pulmonary arterial hypertension, which affects around 4,000 people in the UK.
Blood pressure becomes dangerously high in the pulmonary artery, which carries blood from the right side of the heart to the small arteries in the lungs.
But a Viagra-based drug, called Revatio, is extending the lives of some sufferers by boosting blood flow to the lungs, reducing the workload on the heart.
The drug has also shown potential as a treatment for everything from breast cancer and diabetes to cold hands and heart attacks.
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