endothelin ( 5 x 10 ( -8 ) m ) -induced depolarization was depressed by the dihydropyridine-sensitive ca2+ channel blocker , nicardipine ( 10 ( -7 ) m ) , or the substance p antagonist , spantide ( 5 x 10 ( -6 ) m ) .
C0012315
dihydropyridine
C0028005
nicardipine