Molecular Model Store » Viagra Molecular Model http://molecular-models.com Online store for Molecular model set and kit Mon, 16 Jan 2012 12:00:10 +0000 en hourly 1 Viagra (Sildenafil Citrate) Molecular Model http://molecular-models.com/viagra-sildenafil-citrate-molecular-model/ http://molecular-models.com/viagra-sildenafil-citrate-molecular-model/#comments Sun, 10 Jan 2010 00:59:57 +0000 admin http://molecular-models.com/?p=446
  • Viagra is a drug used to treat erectile dysfunction and pulmonary arterial hypertension (PAH).
  • ]]> Sildenafil citrate, sold as Viagra, Revatio and under various other trade names, is a drug used to treat erectile dysfunction and pulmonary arterial hypertension (PAH).

    It was developed and is being marketed by the pharmaceutical company Pfizer. It acts by inhibiting cGMP specific phosphodiesterase type 5, an enzyme that regulates blood flow in the penis.

    Since becoming available in 1998, sildenafil has been the prime treatment for erectile dysfunction; its primary competitors on the market are tadalafil (Cialis) and vardenafil (Levitra).

    Systematic (IUPAC) name? 1-[4-ethoxy-3-(6,7-dihydro-1-methyl- 7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl) phenylsulfonyl]-4-methylpiperazine

     

    Formula: C22H30N6O4S

     





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