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A 34-year-old member asked:

for how long will lidocaine stay in my system?

1 doctor answer1 doctor weighed in
Dr. Alexander Bankov
Anesthesiology 37 years experience
Not very long: The clinical effect should be completely gone in two hours; although the essays will probably still detect the drug, it is not done in practical settings.

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A 39-year-old member asked:

What do you use before stitches if allergic to lidocaine?

3 doctor answers14 doctors weighed in
Dr. Gary Steven
Pediatric Allergy and Asthma 30 years experience
Several options: There are several different local anesthetics available. If you are truly allergic to lidocaine, your allergist can test you to the various available anesthetics to try to find one to which you will not react.
A 30-year-old member asked:

Can you become allergic to lidocaine?

2 doctor answers5 doctors weighed in
Dr. Dan Fisher
Internal Medicine 27 years experience
Yes.: One may develop allergy at any time to almost any thing.
A 32-year-old member asked:

How long before lidocaine starts to take effect?

2 doctor answers3 doctors weighed in
Dr. Dan Fisher
Internal Medicine 27 years experience
Depends on route: Injected it takes only a minute or so. Topically it takes 15 or more.
A 45-year-old member asked:

How long does lidocaine usually last ?

2 doctor answers3 doctors weighed in
Dr. Tito Vasquez
Plastic Surgery 25 years experience
1/2 to 1 1/2 hours: Depending on where the Lidocaine is placed, the relative blood flow and the ph level of the tissues can affect how long Lidocaine lasts. It may be necessary to mix Lidocaine with other agents such as Epinephrine which help keep the Lidocaine in the tissue. Mixing it with long acting agents such as Marcaine can also lengthen the time that Lidocaine lasts.
A 40-year-old member asked:

I have a vial of 1% lidocaine. How do I make a topical cream with this?

1 doctor answer1 doctor weighed in
Dr. Benjamin Nguyen
A Verified Doctor answered
A US doctor answered Learn more
Difficult: Unless you are a pharmacist specializing in compounding medications, this may be challenging.

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Last updated Jun 15, 2020

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