quinidine drug pathway quinidine pharmacodynamics pathway 2015-08-28T13:02:15Z PW:0001851 SMP:00323 The pathway of quinidine-target interaction and of the biochemical or physiological responses to drug. Its primary action is blocking the fast inward sodium current. However, it can impact on other currents and channels, such as the slow inward calcium, the rapid and slow components of the delayed potassium, and the inward potassium rectifier currents, and the ATP-sensitive potassium channel. Genetic variations can cause differences in the response of the organism to the drug. pathway vpetri