Promethazine has an elimination 50 %-life of 10-14 hours, with excretion of metabolites appearing during the urine and feces. The sulfoxides of promethazine and N-demethylpromethazine would be the predominant metabolites showing up in the urine. Promethazine is metabolized from the liver to various inactive metabolites which include sulfoxides of promethazine, https://woodyt118wbd9.bloggip.com/profile