The drug which produces vasoconstriction despite
being an α adrenergic blocker is:
A. Phenoxybenzamine
B. Ergotamine
C. Dihydroergotoxine
D. Tolazoline
being an α adrenergic blocker is:
A. Phenoxybenzamine
B. Ergotamine
C. Dihydroergotoxine
D. Tolazoline