Hazards of Concomitant Use or Discontinuation of Cytochrome P450 2D6 Inhibitors The concomitant utilization of tramadol hydrochloride tablets with all cytochrome P450 2D6 inhibitors (e.g., amiodarone, quinidine) might result in a rise in tramadol plasma concentrations in addition to a lower inside the levels of the Lively metabolite, M1.How will I