A member asked:

If i have local dental anaesthesia without adrenalin in i can feel pain no matter how much they inject! but with adrenal it works how come?

A doctor has provided 1 answer

Local anesthetic: The epinephrine in some local anesthetics constricts blood vessels in the area of the injection, preventing the local anesthetic from being metabolized (broken down) and carried away.

Answered 1/10/2019

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