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A 25-year-old female asked:

What is in 5% lidocaine used for transnasal endoscopy? is it the same as what dentists use? can people with heart issues have 5%lidocaine?

3 doctor answers6 doctors weighed in
Dr. John Munshower
Family Medicine 30 years experience
Similar: Lidocaine 5% that you are referring to is similar in class to Novacaine that most dentists use. It is used for local numbness and anesthesia. Heart patients, when used for local numbing procedures, can tolerate this medication without any problems. Always check with your Treating Dr. and let any/every Doctor know your full medical history before getting any meds. best wishes.
Dr. Milton Alvis, jr
Preventive Medicine 41 years experience
Lidocaine&Variations: long used for local anesthesia. 5% refers to concentration within whatever carrier medium. Lidocaine used as local subcutaneous agent skin & dental. Systemic IV lidocaine has also been used as antiarrhythic agent (in setting of acute myocardial infarctions) since late 1950s, but also makes some arrhythmias worse/fatal & chronic use ↑es mortality ~3-fold outside acute myocardial infarction setting.
Dr. Jeffrey Bassman
Dentistry 45 years experience
Possibly: If you have heart issues, the lidocaine should be normally epinephrine free.

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Last updated Nov 14, 2014

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