

| 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 |
|
| Clinical data | |
| Trade names | Viagra |
| AHFS/Drugs.com | monograph |
| MedlinePlus | a699015 |
| Licence data | EMA:Link, US FDA:link |
| Pregnancy cat. | B (US) |
| Legal status | ℞ Prescription only |
| Routes | Oral |
| Pharmacokinetic data | |
| Bioavailability | 40% |
| Metabolism | Hepatic (mostly CYP3A4, also CYP2C9) |
| Half-life | 3 to 4 hours |
| Excretion | Fecal (80%) and renal (around 13%) |
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