Anesthesia · single question
Phentolamine mesylate is used in dentistry for which purpose?
Show answer and explanation
Correct answer: A. Reversal of soft-tissue local anesthesia (vasodilator that speeds anesthetic clearance)
Phentolamine is an alpha-adrenergic blocker that vasodilates and accelerates removal of local anesthetic with vasoconstrictor, hastening recovery of normal soft-tissue sensation.Other options: It does not prolong anesthesia; flumazenil reverses benzodiazepines and naloxone reverses opioids.Key exam takeaway: Phentolamine reverses soft-tissue local anesthesia (alpha-blocker vasodilation).