interactions of calcium antagonists with alpha-receptors were further explored in a study in which the pressor responses to intravenous angiotensin ii were compared with those after phenylephrine ( alpha 1-agonist ) or alpha-methylnoradrenaline ( alpha 2-agonist ) in subjects treated with verapamil or nisoldipine , a new dihydropyridine related to nifedipine .
C0028116
nisoldipine
C0012315
dihydropyridine