| gptkbp:instanceOf | gptkb:chemical_compound 
 | 
                        
                            
                                | gptkbp:administeredBy | oral intravenous
 
 | 
                        
                            
                                | gptkbp:approvalYear | 1998 
 | 
                        
                            
                                | gptkbp:ATCCode | gptkb:G04BE03 
 | 
                        
                            
                                | gptkbp:brand | gptkb:Revatio gptkb:Viagra
 
 | 
                        
                            
                                | gptkbp:CASNumber | gptkb:136817-59-9 
 | 
                        
                            
                                | gptkbp:commonName | gptkb:Sildenafil 
 | 
                        
                            
                                | gptkbp:contraindication | nitrates 
 | 
                        
                            
                                | gptkbp:developedBy | gptkb:Pfizer 
 | 
                        
                            
                                | gptkbp:eliminatedIn | urine feces
 
 | 
                        
                            
                                | gptkbp:halfLife | 3-5 hours 
 | 
                        
                            
                                | gptkbp:hasMolecularFormula | C22H30N6O4S 
 | 
                        
                            
                                | gptkbp:isApprovedDrug | true 
 | 
                        
                            
                                | gptkbp:IUPACName | gptkb:1-[[3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methylpiperazine 
 | 
                        
                            
                                | gptkbp:legalStatus | Rx-only 
 | 
                        
                            
                                | gptkbp:listedOn | gptkb:WHO_Model_List_of_Essential_Medicines 
 | 
                        
                            
                                | gptkbp:mechanismOfAction | gptkb:PDE5_inhibitor 
 | 
                        
                            
                                | gptkbp:meltingPoint | 189-190°C 
 | 
                        
                            
                                | gptkbp:metabolism | gptkb:CYP2C9 gptkb:CYP3A4
 
 | 
                        
                            
                                | gptkbp:molecularWeight | 474.58 g/mol 
 | 
                        
                            
                                | gptkbp:PubChem_CID | 5212 CHEMBL192
 DB00203
 
 | 
                        
                            
                                | gptkbp:sideEffect | headache nasal congestion
 dyspepsia
 flushing
 visual disturbances
 
 | 
                        
                            
                                | gptkbp:usedFor | erectile dysfunction pulmonary arterial hypertension
 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:delavirdine 
 | 
                        
                            
                                | gptkbp:bfsLayer | 7 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | 136817-59-9 
 |