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Propoxyphene Napsylate

CHEMBL3989716 Phase 4 Approved Small molecule
Half-Life
—
Bioavailability
—
Protein Binding
—
Molecular Weight
— g/mol
LogP
—
Phase
4

Propoxyphene napsylate is the napsylate salt form of propoxyphene, a synthetic opioid analgesic, providing slower absorption and longer duration of action compared to the hydrochloride salt; it was withdrawn from markets worldwide due to cardiac toxicity risks. See propoxyphene for complete pharmacological details.

Mechanism of Action

Binds to and activates its target receptor, mimicking the action of the endogenous ligand to produce a specific physiological response.

Pharmacokinetics (PK)

Pharmacodynamics (PD)

Mechanism

Binds to and activates its target receptor, mimicking the action of the endogenous ligand to produce a specific physiological response.

2D Structure

SVG PNG

Cite this structure


                        

                            
                            
                        

                    

                


                
                

                    

                    

                        
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SMILES

                    
CCC(=O)O[C@](Cc1ccccc1)(c1ccccc1)[C@H](C)CN(C)C.O.O=S(=O)(O)c1ccc2ccccc2c1

                

                

                
                

                    
InChI

                    
InChI=1S/C22H29NO2.C10H8O3S.H2O/c1-5-21(24)25-22(18(2)17-23(3)4,20-14-10-7-11-15-20)16-19-12-8-6-9-13-19;11-14(12,13)10-6-5-8-3-1-2-4-9(8)7-10;/h6-15,18H,5,16-17H2,1-4H3;1-7H,(H,11,12,13);1H2/t18-,22+;;/m1../s1

                

                

                

                    
                    

                        
HBD / HBA

                        
- / -

                    

                    
                    
                

            


            
            

                
                


    
    
        
    
    
    
No targets recorded

    
    
Target interaction data is not yet available for this drug.

    



                
            


            
            

                
                


    
    
        
    
    
    
No interactions recorded

    
    
Drug interaction data is not yet available for this compound.

    



                
            


            
            

                
                


    
    
        
    
    
    
No side effects recorded

    
    
Side effect data is not yet available for this drug.

    



                
            


            
            
            

                
Frequently Asked Questions

                

                    
                    

                        
                        

                            
Propoxyphene napsylate is the napsylate salt form of propoxyphene, a synthetic opioid analgesic, providing slower absorption and longer duration of action compared to the hydrochloride salt; it was withdrawn from markets worldwide due to cardiac toxicity risks. See propoxyphene for complete pharmacological details.

                        

                    

                    

                    

                    
                    

                        
                        

                            
Binds to and activates its target receptor, mimicking the action of the endogenous ligand to produce a specific physiological response.

                        

                    

                    

                    

                    

                        
                        

                            
Yes, Propoxyphene Napsylate is an approved drug. It has reached clinical phase 4. It is classified as a Small molecule.

                        

                    

                

            

            

            
            

            
            

            
            
{# References & Data Sources section for drug detail pages.
   Renders standard pharmacological database links plus the drug's data_sources field. #}


    
References & Data Sources

    
    
        
        
  • 
            
            
                ChEMBL — European Bioinformatics Institute (EBI).
                CHEMBL3989716.
                Open-access bioactivity database.
            
        
    • 
        
        
        
        
        
    

    
Data aggregated from publicly available pharmacological databases. Last updated 2026-02-27.




        


        
        
    


    



    
Medical Disclaimer

    

        This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making medication decisions.
    

    

        Data sources:
        ChEMBL,
        PubChem,
        DailyMed.