flecainide drug pathway flecainde pharmacodynamics pathway 2015-10-08T14:42:57Z PW:0002033 SMP:00331 The pathway of flecainide-target interaction and of the biochemical or physiological responses to drug. The drug is an antiarrhythmic agent that acts by blocking sodium and possibly other channels in cardiomyocytes. Genetic variations can cause differences in the response of the organism to the drug. pathway vpetri