1.5 to 2 hours: Though the half-life of Lidocaine is 1.5 to 2 hours, the clinical effectiveness of Lidocaine is usually much shorter (around 30 - 45 minutes).
Answered 9/6/2019
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30 min to 2 hours: 30 minutes or so for plain lidocaine, and up to 2 hours or so for Lidocaine with Epinephrine in it.
Answered 5/10/2017
5.6k views
Lidocaine: Lidocaine will last 45'. It lasts up to 90' if Epinephrine is added.
Answered 7/27/2016
4.5k views
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