Amlodipine DESCRIPTION From our sponsors: . From our sponsors: Amlodipine besylate is a long-acting calcium channel blocker. Amlodipine besylate is chemically described as (R.S.) 3-ethyl-5-methyl-2-(2-aminoethoxymethyl)-4-(2-chlorophenyl)-1, 4-dihydro-6-methyl-3, 5-pyridinedicarboxylate benzenesulphonate. Its empirical formula is: C20H25ClN2O5 C6H6O3S. Amlodipine besylate is a white crystalline ...