calcium channel blocker drug pathway dihydropyridine calcium channel blocker drug pathway 2015-09-17T10:31:33Z PW:0001894 The pharmacokinetics and pharmacodynamics pathway of dihydropyridine calcium channel blockers - agents derived from dihydropyridine and used to reduce arterial pressure. Genetic variations can result in changes in drug availability and can cause differences in the response of the organism to the drug. pathway vpetri