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Georgia Regents researchers investigate ways to help cystic fibrosis patients exercise is trying to identify whether that is the source of exercise intolerance and what intervention might work. Sildenafil citrate, the generic form of Viagra, is known to help dilate blood vessels. So the question becomes "once it dilates...
Researchers test Viagra alternative

...surrounding veins and traps the blood inside. The gas nitric oxide is essential to this muscle relaxation. Viagra (sildenafil citrate) works by blocking an enzyme called phosphodiesterase, which breaks down cyclic GMP, which is essential to the...
XXX Technology
Viagra's popularity shows no sign of fading

...that about 225,000 U.S. physicians have prescribed the impotence drug. Pfizer scientists in Britain developed sildenafil citrate -- the chemical name for Viagra -- as a heart medication, but that use wasn't successful. They soon realized...
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Viagra for her might be on way

...male and female rats, which plays a key role in supplying blood to erectile tissue, Dr. Allahdadi said. Using sildenafil citrate, otherwise known as Viagra, and two other erectile dysfunction drugs, the researchers were able to get a response...
Making Whoopie

...Viagra might have some aid perhaps with some female sexual problems," Dr. Lewis said. Chemical reactions Viagra (sildenafil citrate) works on the complex chemical reaction that allows a man to achieve an erection. Within the penis, a layer of...
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