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By certification 
Sildenafil Citrate
Synonyms: VIAGRA; uk92480-10
CAS#: 139755-83-2
MF: C28H38N6O11S
MW: 666.7
Chemical Properties: White Solid
Usage: An orally active selective type 5 cGMP phosphodiesterase inhibitor
Dosage: As with all prescription drugs, proper dosage is at the discretion of a licensed medical doctor. The dose of sildenafil for erectile dysfunction is 25 mg to 100 mg taken not more than once per day between 30 minutes and 4 hours prior to sexual intercourse.
Synonyms: VIAGRA; uk92480-10
CAS#: 139755-83-2
MF: C28H38N6O11S
MW: 666.7
Chemical Properties: White Solid
Usage: An orally active selective type 5 cGMP phosphodiesterase inhibitor
Dosage: As with all prescription drugs, proper dosage is at the discretion of a licensed medical doctor. The dose of sildenafil for erectile dysfunction is 25 mg to 100 mg taken not more than once per day between 30 minutes and 4 hours prior to sexual intercourse.
