Pharmaceutical Name (substance): Sildenafil citrate

Common Brand, Trade, Commercial Denominations: Kamagra, Kamagra Tabs, Kamagra Jelly, Caverta, Magara, Pfigra, Seagra, Viagra, Revatio, Sildenafil Viagra, Silagra, Edegra, Zenegra, Meltabs, Penegra, Generic Uprima, Cyara.

Manufacturers: Ajanta Pharma, Pfizer, Cipla, Alkem, Ranbaxy.

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 citrate
Molecular Formula: C22 H30 N6 O4 S
Molecular mass base: 474.6 g/mol
Bioavailability: 40%
Half life: 3 to 4 hours
Metabolism: Hepatic
Excretion: Fecal (80%) and renal (around 13%)

CAS number: 171599-83-0 Viagra CAS number: 139755-83-2)
Merck Index Number: 123789
Routes of administration: Oral
Pharmacologic class: Phosphodiesterase type 5 (PDE5) inhibitor
Therapeutic class: Anti-erectile dysfunction agent