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Some reports say that since Viagra can widen blood vessels, it can increase blood flow through the heart, permitting more oxygen to the lungs and improving oxygen supply to the rest of the body.
Research has found that taking Viagra does not increase high blood pressure. Sildenafil, the active ingredient in Viagra, is actually used to treat a certain kind of high blood pressure in the lungs.
For example, in clinical trials of sildenafil, 28 percent of men reported headache (by far the most common side effect) at a dosage of 100mg, compared to just 16 percent of men who used 25mg and ...
Sildenafil acts by blocking phosphodiesterase 5 (PDE 5), an enzyme that promotes breakdown of cGMP, which regulates blood flow in the penis. [8] It requires sexual arousal to work, and does not by itself cause or increase sexual arousal. [8] It also results in dilation of the blood vessels in the lungs. [8]
Chemical structure of sildenafil (Viagra), the prototypical PDE5 inhibitor. A phosphodiesterase type 5 inhibitor (PDE5 inhibitor) is a vasodilating drug that works by blocking the degradative action of cGMP-specific phosphodiesterase type 5 (PDE5) on cyclic GMP in the smooth muscle cells lining the blood vessels supplying various tissues.
In fact, a 2004 study showed that sildenafil increased the maximum exercise capacity of mountaineers and trekkers at both sea level and at altitude. ... Heart attack. Stroke. Dizziness.
Sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra) typically start working within 30 to 60 minutes, while avanafil (Stendra) works within 15 to 30 minutes. As with most prescription ...
Viagra and its main ingredient, sildenafil are medications known as PDE5 inhibitors. These drugs work to increase blood flow necessary for arousal when you're stimulated.
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