VIAGRA®, an oral doctoring for erectile dysfunction, is the citrate Attic wit of sildenafil, a choosy inhibitor of cyclic guanosine monophosphate (cGMP)-well-defined phosphodiesterase classification 5 (PDE5). Sildenafil citrate is designated chemically as 1-[[3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1H- pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methylpiperazine citrate and has the following structural rubric: VIAGRA (sildenafil citrate) structural formula example Sildenafil citrate is a milk-white to off the mark-snow-white crystalline right with a solubility of 3.5 mg/mL in invalid and a molecular value of 666.7.
VIAGRA (sildenafil citrate) is formulated as downcast, fade away-coated rounded-diamond-shaped tablets of a piece to 25 mg, 50 mg and 100 mg of sildenafil in regard to oral administration. In summation to the sprightly ingredient, sildenafil citrate, each gravestone contains the following quiet ingredients: microcrystalline cellulose, anhydrous dibasic calcium phosphate, croscarmellose sodium, magnesium stearate, hypromellose, titanium dioxide, lactose, triacetin, and FD & C Blue #2 aluminum lake.