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A 27-year-old male 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?

1 doctor answer3 doctors weighed in
Dr. Arnold Malerman
Orthodontics 55 years experience
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.
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Last updated Jan 10, 2019


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