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Viagra (Sildenafil citrate) is a drug, currently marketed in pill form for treating erectile dysfunction and pulmonary arterial hypertension .Viagra pills, in 25 mg, 50 mg, 100 mg and 150 mg doses, are blue and diamond-shaped.
The mechanism of action of Viagra involves the protection of cyclic guanosine monophosphate (cGMP) from degradation by cGMP specific phosphodiesterase type 5 (PDE5) in the corpus cavernosum. This smooth muscle relaxation leads to vasodilation and increased inflow of blood into the spongy tissue of the penis causing an erection.Nitric oxide (NO) in the corpus cavernosum of the penis binds to the receptors of an enzyme called guanylate cyclase which results in increased levels of cGMP, leading to smooth muscle relaxation (vasodilation) of the intimal cushions of the helicine arteries.
Viagra (Sildenafil citrate) is a drug, currently marketed in pill form for treating erectile dysfunction and pulmonary arterial hypertension .Viagra pills, in 25 mg, 50 mg, 100 mg and 150 mg doses, are blue and diamond-shaped.
The mechanism of action of Viagra involves the protection of cyclic guanosine monophosphate (cGMP) from degradation by cGMP specific phosphodiesterase type 5 (PDE5) in the corpus cavernosum. This smooth muscle relaxation leads to vasodilation and increased inflow of blood into the spongy tissue of the penis causing an erection.Nitric oxide (NO) in the corpus cavernosum of the penis binds to the receptors of an enzyme called guanylate cyclase which results in increased levels of cGMP, leading to smooth muscle relaxation (vasodilation) of the intimal cushions of the helicine arteries.
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