these antagonists were classified into five groups : dihydropyridine group ( i.e . nifedipine and nitrendipine ) , benzothiazepine group ( i.e . diltiazem ) , phenylalkylamine group ( i.e . verapamil and d600 ) , phenothiazine group ( i.e . trifluoperazine ) and diphenylpiperazine group ( i.e . flunarizine and cinnarizine ) .
C0012315
dihydropyridine
C0028066
nifedipine