perifusing 0.2 mm nimodipine , a dihydropyridine ca2+ channel blocker , before and after restoration of ca2+ to the ca2 ( + ) -free medium inhibited acth release by 40-48 % , and the blockade persisted for at least 70 min after nimodipine was removed from the medium .
C0012315
dihydropyridine
C0028094
nimodipine