Phentolamine mesylate (OraVerse) is a drug used to reverse soft tissue anesthesia and the associated functional deficits resulting from a local dental anesthetic containing a vasoconstrictor. Which statement best describes its mechansim of action?
Causes vasodilation and increased blood flow in iniection area
Prevents the influx of sodium into the neuron by blocking neuronal channels
Prevents the efflux of sodium out of the neuron
Causes vasoconstriction and decreased blood flow in injection area
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