administration of an antagonist of the cardiovascular actions of vasopressin [ 1- ( beta-mercapto-beta , beta-cyclopentamethylenepropionic acid ) -8-d-arginine vasopressin ] in the presence of either alpha adrenoceptor antagonist alone was without effect in long-evans or brattleboro rats , but , under these conditions , subsequent administration of captopril caused a profound and sustained hypotension in both strains .
C0006938
captopril
C0020649
hypotension