Phentolamine (Regitine), an alpha-adrenergic blocker, is most frequently used. a. To prevent cell death after extravasation of

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Phentolamine (Regitine), an alpha-adrenergic blocker, is most frequently used. 

a. To prevent cell death after extravasation of intravenous dopamine or norepinephrine. 

b. To treat COPD in patients with hypertension or arrhythmias. 

c. To treat hypertension and BPH in male patients. 

d. To block bronchoconstriction during acute asthma attacks.

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