viagra

viagra

free web hosting | free hosting | Business WebSite Hosting | Free Website Submission | shopping cart | php hosting
(sildenafil citrate)
Tablets
viagra : DESCRIPTION

viagra, 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:

viagra ( Sildenafil citrate )is a white to off-white crystalline powder with a solubility of 3.5 mg/mL in
water and a molecular weight of 666.7. viagra (sildenafil citrate) is formulated as blue,
film-coated rounded-diamond-shaped tablets equivalent to 25 mg, 50 mg and 100 mg of
viagra sildenafil for oral administration. In addition to the active ingredient, viagra sildenafil citrate, each tablet
contains the following inactive ingredients: microcrystalline cellulose, anhydrous dibasic calcium
phosphate, croscarmellose sodium, magnesium stearate, hypromellose, titanium dioxide, lactose,
triacetin, and FD & C Blue #2 aluminum lake.
CLINICAL PHARMACOLOGY

viagra

viagra Mechanism of Action
The physiologic mechanism of erection of the penis involves release of nitric oxide (NO) in the
corpus cavernosum during sexual stimulation. NO then activates the enzyme guanylate cyclase,
which results in increased levels of cyclic guanosine monophosphate (cGMP), producing smooth
muscle relaxation in the corpus cavernosum and allowing inflow of blood. viagra Sildenafil has no
direct relaxant effect on isolated human corpus cavernosum, but enhances the effect of nitric
oxide (NO) by inhibiting phosphodiesterase type 5 (PDE5), which is responsible for degradation
of cGMP in the corpus cavernosum. When sexual stimulation causes local release of NO,

generic viagra
buy viagra
viagra online
viagra cheap
viagra for woman