NOT KNOWN FACTUAL STATEMENTS ABOUT PROMETHAZINE SYRUP

1, seven.2) ]. Risks of Concomitant Use or Discontinuation of Cytochrome P450 2D6 Inhibitors The concomitant use of Promethazine with Codeine Oral Solution with all cytochrome P450 2D6 inhibitors (eg., amiodarone, quinidine) may well lead to a rise in codeine plasma concentrations and also a lower in active metabolite morphine plasma concentration