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A 42-year-old member asked:

How long does local anesthesia last?

4 doctor answers10 doctors weighed in
Dr. Orrin Ailloni-Charas
Anesthesiology 30 years experience
It depends. : The duration of action of a local anesthetic is related to the choice of the specific medication and its uptake and metabolism. Some local anesthetics last longer than others. The location of the administration and whether or not a vasoconstrictor was added to slow uptake also have impact. A discussion with your doctor about expectations is appropriate.
Dr. Ronald Achong
Oral &Maxillofacial Surgery 19 years experience
Depends: It can last less than an hour to over several hours. There are many different types of local anesthesia and some without epinephrine. Usually anesthetics that have epinephrine, have a longer duration of action.
Dr. Richard Pollard
Anesthesiology 31 years experience
Varies: Some local anesthetics wear off within 30 minutes, while other are specifically designed to be active for up to 20 hours. It depends on the type and location of the drug. Talk to your anesthesiologist about medications that they will use.
Dr. Anthony Pollizzi
Anesthesiology 37 years experience
Hours: The LAs may last up to 24 hours depending on the type of drug used.,

Similar questions

A 34-year-old member asked:

Root canal local anesthesia how long does it last?

3 doctor answers12 doctors weighed in
Dr. Reena Gupta
Dentistry 20 years experience
Can vary: Depends on the area as well as how the anesthesia was given..Cob be as less as 45 min to as long as 6 to 8 hours.Sometimes anesthesia is given as infiltration ...Sometimes as nerve block which can take longer..Especially for back molars..Also depends on location as well as course of the nerve..
A 48-year-old member asked:

How long does it take for local anesthesia to wear off?

4 doctor answers6 doctors weighed in
Dr. Mark Hoepfner
Surgery 40 years experience
Varies: Some will last about an hour, some for about 24 hours, and a newer type has the potential of lasting for up to 3 days.
A 38-year-old member asked:

How long can it take for local anesthesia injection to wear off?

3 doctor answers5 doctors weighed in
Dr. Mark Hoepfner
Surgery 40 years experience
Depends: It depends on what your doctor used. Most local anesthetic medications last about an hour. Some can last up to 24 hours, and there is a newer one that may not yet be available everywhere that reports that it can last up to 3 days.

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Last updated Jul 16, 2019

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