Each film-coated tablet contains: Sildenafil Citrate 50 mg.
It is a citrate salt of Sildenafil. 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]suIfonyl]-4-methylpiperazine citrate.