Challenges 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) may possibly cause a rise in tramadol plasma stages as well as a lower while in the levels of the active metabolite, M1.Si se decide pr