m-Nifedipine is an impurity of Nifedipine (BAY-a-1040). Nifedipine is a potent calcium channel blocker and drug of choice for cardiac insufficiencies[1].
[1]. Ratre MS, et al. Effect of azithromycin on gingival overgrowth induced by cyclosporine A + nifedipine combination therapy: A morphometric analysis in rats. J Indian Soc Periodontol. 2016 Jul-Aug;20(4):396-401.
















