we now report our studies designed to compare , in vivo , the efficacy of nifedipine and other calcium active compounds including : ( a ) structurally similar calcium channel blockers ( nimodipine , nicardipine ) from the dihydropyridine class , ( b ) structurally different calcium channel blockers from the benzothiazepine ( diltiazem ) and the phenylalkylamine ( verapamil ) classes , and ( c ) calmodulin antagonists ( trifluoperazine and calmidazolium ) for ability to enhance the antitumor action of cisplatin .
C0028005
nicardipine
C0012315
dihydropyridine