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lidocaine hydrochloride,local anesthetic drugs lidocaine, also known as xylocaine and lignocaine , is a medication used to numb tissue in a specific area and to treat ventricular tachycardia . it can also be used for nerve blocks . lidocaine mixed with a small amount of epinephrine is available to allow larger doses to be used as numbing and to make it last longer . when used as an injectable it typically begins working within four minutes and lasts for half an hour to three hours . lidocaine may also be applied directly to the skin for numbing.

lidocaine hydrochloride,common side effects with intravenous use include sleepiness, muscle twitching , confusion , changes in vision , numbness , tingling, and vomiting . it can cause low blood pressure and an irregular heart rate.there are concerns that injecting it into a joint can cause problems with the cartilage . it appears to be generally safe for use in pregnancy . a lower dose may be required in those with liver problems . it is generally safe to use in those allergic to tetracaine or benzocaine . lidocaine is an antiarrhythmic medication of the class ib type . lidocaine works by blocking sodium channels and thus decreasing the rate of contractions of the heart . when used locally as a numbing agent, local neurons cannot signal the brain.

lidocaine hydrochloride,local anesthetic drugs lidocain was discovered in 1946 and went on sale in 1948 . it is on the who model list of essential medicines , the most important medications needed in a basic healthcare system . it is available as a generic medication and is not very expensive . the wholesale cost in the developing world in 2014 was us$0.45 to $1.05 wholesale per 20ml vial of medication .

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