The researchers used climbers as “guinea pigs” to test how effective Viagra was in relieving pulmonary hypertension.
Fourteen healthy male mountaineers were given either Viagra (sildenafil) or a dummy pill.
It was found sildenafil reduced high blood pressure and improved the transport of oxygen in the blood in both situations.:dubious:
Sildenafil is used because there is a biochemical similarity between the penis and the lungs :eek: