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A member asked:
How long do the effects of novacaine last?
A doctor has provided 1 answer
Depends.: Novocaine has not been used in the us for many years. Newer, more effective local anesthetics have replaced it. Some last longer than others and where the injection is given matters as well. Lower teeth can stay numb longer. The amount given will also determine duration. In general, numbness will last from 30 minutes to up to 6-8 hours.
Answered 7/11/2017
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