| CAS_supplemental = 58-33-3 (hydrochloride) | ChemSpiderID = 4758 | ATC_prefix = D04 | ATC_suffix = AA10 | ATC_supplemental=, | PubChem = 4927 | DrugBank = APRD00601 | smiles = CN(C)C(C)CN1c3ccccc3Sc2ccccc12 | C = 17 |H = 20 |N = 2 |S = 1 | molecular_weight = 284.42 g/mol | bioavailability = 88% absorbed but after first-pass metabolism reduced to 25% absolute bioavailability | protein_bound = 93% | metabolism = Hepatic glucuronidation and sulfoxidation | elimination_half-life = 16-19 hours | e… (More on Promethazine)