One, seven.2) ]. Dangers of Concomitant Use or Discontinuation of Cytochrome P450 2D6 Inhibitors The concomitant utilization of Promethazine with Codeine Oral Solution with all cytochrome P450 2D6 inhibitors (eg., amiodarone, quinidine) may end in a rise in codeine plasma concentrations in addition to a lower in Energetic metabolite morphine https://trentontuudc.blogars.com/26570190/considerations-to-know-about-promethazine-codeine