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Promethazine is metabolized from the liver to a range of compounds; the sulfoxides of promethazine and N-demethylpromethazine will be the predominant metabolites showing up during the urine.Disposal of Unused Promethazine HCl and Codeine Phosphate Oral Resolution Recommend sufferers to properly get rid of unused Promethazine HCl and Codeine Phospha