Similar names: 7H-Pyrazolo[4,3-d]pyrimidin-7-one, 5-[2-ethoxy-5-[(4-methyl-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-, 2-hydroxy-1,2,3-propanetricarboxylate (1:1); Piperazine, 1-[[3-(4,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methyl-, 2-hydroxy-1,2,3-propanetricarboxylate (1:1) (9CI); 1-[[3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methylpiperazine, 2-hydroxy-1,2,3-propanetricarboxylate (1:1); Actra-Rx; Alisiga; Apodefil; Caverta 100; Edegra; Kamagra; Maxifort; Niagra Actra-Rx; Penegra; Sildegra; Sildenafil citrate; Sildigra; Siligra; Sollevare; Tonafil; UK 92480; UK 92480-10; Vega; Vega (pharmaceutical); Viagra; Vigrex; Zenegra