hydralazine normalized systolic blood pressure ( 135 +/- 6 mm hg ) , whereas timolol ( 144 +/- 5 mm hg ) , phenoxybenzamine ( 166 +/- 5 mm hg ) or phentolamine ( 154 +/- 10 mm hg ) only moderately decreased blood pressure in rats harboring pheochromocytoma .
C0031448
phentolamine
C0031511
pheochromocytoma