tiapamil probably operates as an agent with mixed na+- , k+- , ca2+- and mg2+-antagonistic effects and , in this respect , differs considerably from the more specific ca2+ antagonists such as verapamil , d 600 ( gallopamil ) , nifedipine ( and other 1,4-dihydropyridines ) or diltiazem .
C0028066
nifedipine
C0012315
dihydropyridines