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buy viagra now, an oral therapy for erectile dysfunction, is the citrate salt of sildenafil, a selective
inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5).
Sildenafil citrate is designated chemically as 1-[[3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1Hpyrazolo[
4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methylpiperazine citrate and has the
following structural formula:

buy viagra now ( Sildenafil citrate )is a white to off-white crystalline powder with a solubility of 3.5 mg/mL in
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phosphate, croscarmellose sodium, magnesium stearate, hypromellose, titanium dioxide, lactose,
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CLINICAL PHARMACOLOGY

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The physiologic mechanism of erection of the penis involves release of nitric oxide (NO) in the
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