Lidocaine topical: side effects, dosage, interactions, FAQs, reviews. Used for: anal itching, anesthesia, burns, external, gastrointestinal surgery, gastrointestinal. Easy-to-read patient tips for lidocaine covering how it works, benefits, risks, and best practices. Lidocaine is the monocarboxylic acid amide resulting from the formal condensation of N, N -diethylglycine with 2,6-dimethylaniline. It has a role as a xenobiotic, a local anaesthetic, an anti-arrhythmia drug, an environmental contaminant and a drug allergen. It is a member of benzenes, a monocarboxylic acid amide and a tertiary amino compound. It is functionally related to a glycinamide. Lidocaine can cause serious side effects, especially in children, if it gets into the mouth and is swallowed. If you are using the viscous topical solution medicine in the mouth or throat, be aware of signs of toxicity. Find patient medical information for Lidocaine (mucous membranes) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Find patient medical information for Lidocaine transdermal on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Lidocaine, also known as lignocaine and sold under the brand name Xylocaine among others, is a local anesthetic of the amino amide type. [12] It is also used to treat ventricular tachycardia and ventricular fibrillation. [9][10] When used for local anaesthesia or in nerve blocks, lidocaine typically begins working within several minutes and lasts for half an hour to three hours. [10][11. Learn about lidocaine viscous 2% usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. Topical lidocaine come in many different forms, such as topical creams, ointment, gels, and foaming soaps, and most are available over the counter. If used as directed, topical lidocaine shouldn't cause many side effects. But if you apply more than recommended, topical lidocaine can cause dizziness, headache, and confusion. Lidocaine is used to relieve nerve pain after shingles (infection with the herpes zoster virus). Learn about side effects, drug interactions, dosages, warnings, and more.