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Sildenafil
Systematic (IUPAC) name
1-pyrimidin-5-yl)
phenylsulfonyl]-4-methylpiperazine citrate
Identifiers
CAS number139755-83-2
ATC codeG04BE03
PubChem5281023
DrugBankAPRD00556
Chemical data
FormulaC22H30N6O4S 
Mol. massbase: 474.6 g/mol
SMILESeMolecules & PubChem
Pharmacokinetic data
Bioavailability40%
MetabolismHepatic
Half life3-4h
ExcretionCYP3A4
Therapeutic considerations
Pregnancy cat.

N/A

Legal status

℞ Prescription only

RoutesOral

Sildenafil citrate, sold under the names Viagra, Revatio and under various other names, is a drug used to treat male erectile dysfunction (impotence) and pulmonary arterial hypertension (PAH), developed by the pharmaceutical company Pfizer. Its primary competitors on the market are tadalafil (Cialis), and vardenafil (Levitra).

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About Viagra

SildenafilSystematic (IUPAC) name1-pyrimidin-5-yl)phenylsulfonyl]-4-methylpiperazine citrateIdentifiersCAS number139755-83-2ATC codeG04BE03PubChem5281023DrugBankAPRD00556Chemical dataFormulaC22H30N6O4S Mol. massbase: 474.6 g/molSMILESeMolecules... Read more

Viagra related Videos
Recent talks about Viagra
  • This month’s print edition of Fast Company (3/08) highlights the popular male history of Viagra (sildenafil). Patented in 1996 and FDA approved in 1998, this Pfizer developed drug began as a potential treatment for pulmonary arterial hypertension, but was found to be better suited for penile erections. During the first month available....


  • Researchers in New Zealand recently conducted a survey of 100 couples about ED medication. They found that most women prefer the flexibility (poor choice of words) of Cialis. Cialis can be used for 36 hours compared to Viagra's 4 hour lifespan.


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  • Alan Greenspan's answer to goosing the economy brought us bubble after bubble, fraud upon fraud. Bernanke, who ought to know better or, at the very least, ought to gamble on being wrong by different means, is planning to give another shot of Viagra to this increasingly flaccid economy.


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