Promethazine is metabolized by the liver to a range of compounds; the sulfoxides of promethazine and N-demethylpromethazine are classified as the predominant metabolites appearing from the urine.Promethazine has an elimination 50 %-life of ten-14 hrs, with excretion of metabolites showing up while in the urine and feces. The sulfoxides of p… Read More