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Lidocaine hydrochloride

General Physical and chemical properties Local anesthetic and antiarrhythmic drugs Application Metabolism Indications Usage and dosage Adverse effect Additional information Medicine interactions Precautions References
Lidocaine hydrochloride
Lidocaine hydrochloride structure
Chemical Name:
Lidocaine hydrochloride
s202;v262;xylocard;xyloneural;LIDOCAINE HCL;Lidocaine HCI;Sell Lidocaine;Lithium Claviate;Licain Monohydrate;Coluracetam powder
Molecular Formula:
Formula Weight:
MOL File:

Lidocaine hydrochloride Properties

Melting point:
storage temp. 
Inert atmosphere,2-8°C
CAS DataBase Reference
73-78-9(CAS DataBase Reference)
EWG's Food Scores
NCI Drug Dictionary
lidocaine hydrochloride
EPA Substance Registry System
Acetamide, 2-(diethylamino)-N-(2,6-dimethylphenyl)-, monohydrochloride (73-78-9)
  • Risk and Safety Statements
RIDADR  3249
HazardClass  6.1(b)
PackingGroup  III
Toxicity LD50 oral in mouse: 220mg/kg

Lidocaine hydrochloride price More Price(4)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich PHR1257 Lidocaine hydrochloride Pharmaceutical Secondary Standard; Certified Reference Material 73-78-9 500 mg $72.8 2021-03-22 Buy
Sigma-Aldrich L0600000 Lidocaine hydrochloride European Pharmacopoeia (EP) Reference Standard 73-78-9 $198 2021-03-22 Buy
Sigma-Aldrich 1366013 Lidocaine hydrochloride United States Pharmacopeia (USP) Reference Standard 73-78-9 150 mg $366 2021-03-22 Buy
Sigma-Aldrich PHR1257 Lidocaine hydrochloride Pharmaceutical Secondary Standard; Certified Reference Material 73-78-9 5 g $438 2021-03-22 Buy

Lidocaine hydrochloride Chemical Properties,Uses,Production


Lidocaine hydrochloride was synthesized by Löfgren and Lundquist in 1943, and was clinically introduced in 1948. It remains one of the most widely used local anaesthetics. It can be administered parenterally for a peripheral nerve block (PNB), intravenously, or applied topically at strengths of 2–4%. The addition of epinephrine 1:200 000 to 1:100 000 slows the vascular absorption of lidocaine and prolongs its effects.

Physical and chemical properties

Lidocaine hydrochloride is white and odorless crystal with bitter and numb taste. It is easily soluble in water, ethanol and organic solvents, but insoluble in ether. Aqueous solution in the case of acid and alkali do not break down, repeated autoclave rarely go bad.

Local anesthetic and antiarrhythmic drugs

Lidocaine hydrochloride is a local anesthetic and antiarrhythmic drug. It is clinically used for infiltration anesthesia, epidural anesthesia, surface anesthesia (including in the thoracoscopy or abdominal surgery for mucosal anesthesia) and nerve conduction block. The drug can also be used for acute myocardial infarction after ventricular premature beats and ventricular tachycardia, and for digitalis poisoning, cardiac surgery and ventricular arrhythmias caused by cardiac catheterization. But it is usually ineffective for supraventricular arrhythmias.
Lidocaine hydrochloride is an amide local anesthetic. After blood absorption or intravenous administration, the drug has obvious excitement and inhibition of biphasic effects for the central nervous system, and no excitement of the pioneer. With the dose increased, the role or toxicity increased, there is an anti-convulsive effect with sub-poisoning plasma concentration; Blood concentration of more than 5μg • ml-1 can occur convulsions. Lidocaine hydrochloride in low doses can promote outflow of K+ in cardiomyocytes, reduce myocardial autonomy, and has antiarrhythmic effects. In the treatment dose, lidocaine hydrochloride has no significant effect for the electrical activity of cardiomyocytes, atrioventricular conduction and myocardial contraction. Increased plasma concentration may cause slowing of heart conduction, atrioventricular block, inhibition of myocardial contractility and decreased cardiac output.


Lidocaine hydrochloride is characterized by strong penetration, strong dispersion, rapidly onset. The anesthetic performance is twice that of procaine and the toxicity is1. There is an anesthetic effect after 5 minutes treatments, and anesthesia can last 1 to 1.5 hours, 50% longer than procaine. The drug is effective on the heart of the disease or arrhythmia caused by cardiac glycoside, but on the supraventricular tachycardia is poor. This product is fast and oral ineffective, with short duration, and often used as intravenous administration.


Lidocaine is metabolized by the liver with only a small amount (3%) found unchanged in urine. The three main mechanisms of metabolism are shown below: N-de-ethylation > monoethylglycinexylidide (MEGX) > glycinexylidide Hydrolysis of glycinexylidide 5-hydroxylation of lidocaine’s benzene ring Lidocaine possesses convulsant activity. Hepatic disease or reduced hepatic blood flow (as in congestive cardiac failure) will lower metabolic capacity.


Usage and dosage

Surface anesthesia with solution of 2% to 5%.Infiltration anesthesia with solution of 0.25% to 0.5%, conduction anesthesia with 2%, each injection point, horse, cattle 8 to 12 ml, sheep 3 to 4 ml. Epidural anesthesia with 2% solution, horse, cow, 8 to 12 ml, dog, cat, 0.22 ml per kilogram of body weight. Subcutaneous injection with 2% solution, pig, sheep, 80 ml, horse, cow, 400 ml, dog,25 ml, cat, 8.5 ml.
Treatment of arrhythmia, intravenous injection: Per kg of dog’s body weight of the initial dose is 2 to 4 mg, followed by 25 to 75 micrograms per minute intravenous infusion; Cat initial dose of 250 to 500 micrograms, followed by intravenous infusion of 20 micrograms per minute.

Adverse effect

The incidence of adverse effect with lidocaine hydrochloride was about 6.3%. Most adverse effects are dose dependent. Adverse effects are drowsiness, dizziness, nausea, vomiting, burnout, euphoria, insanity, muscle convulsions, syncope, blurred vision, confusion and difficulty breathing. Large doses lead to severe sinus bradycardia, cardiac arrest, severe atrioventricular block and weakened myocardial contractility, reduced blood pressure and so on. Excess concentrations of lidocaine hydrochloride in the blood cause some problems. For example, atrial conduction slows, atrioventricular blocks (A-V-B), and inhibits myocardial contractility and cardiac output decreases. There are little allergic effects, such as erythema rash, angioneurotic edema and so on.

Additional information

Lidocaine is contraindicated in patients with known hypersensitivity to local anaesthetics of the amide type and in patients with porphyria. Reactions due to overdose with lidocaine (high plasma levels) are systemic and involve the central nervous and cardiovascular systems. Effects include medullary depression, tonic and clonic convulsions, and cardiovascular collapse Solutions in multidose vials may contain hydrobenzoate derivatives and have been associated with allergic reactions in some patients. As with all of the amide local anaesthetics protein binding is reduced in the neonate (50% versus 64% in the adult), which necessitates reduced doses if adverse reactions are to be avoided.

Medicine interactions



Chemical Properties

White to Off-White Solid




Apply to affected site 5 to 10 minutes before procedure. Duration of anesthesia is relatively short (<1 hour).


Local anesthesic;Na+ channel blocker


Anesthetic (local); antiarrhythmic (class IB). Long-acting, membrane stabilizing agent against ventricular arrhythmia. Originally developed as a local anesthetic.


ChEBI: The anhydrous form of the hydrochloride salt of lidocaine.

Manufacturing Process

One mol of 2,6-xylidine is dissolved in 800 ml glacial acetic acid. The mixture is cooled to 10°C, after which 1.1 mol chloracetyl chloride is added at one time. The mixture is stirred vigorously during a few moments after which 1,000 ml half-saturated sodium acetate solution, or other buffering or alkalizing substance, is added at one time. The reaction mixture is shaken during half an hour. The precipitate formed which consists of ω-chloro-2,6- dimethyl-acetanilide is filtered off, washed with water and dried. The product is sufficiently pure for further treatment. The yield amounts to 70 to 80% of the theoretical amount.
One mole of the chloracetyl xylidide thus prepared and 2.5 to 3 mols diethyl amine are dissolved in 1,000 ml dry benzene. The mixture is refluxed for 4 to 5 hours. The separated diethyl amine hydrochloride is filtered off. The benzene solution is shaken out two times with 3N hydrochloric acid, the first time with 800 ml and the second time with 400 ml acid. To the combined acid extracts is added an approximately 30% solution of sodium hydroxide until the precipitate does not increase.
The precipitate, which sometimes is an oil, is taken up in ether. The ether solution is dried with anhydrous potassium carbonate after which the ether is driven off. The remaining crude substance is purified by vacuum distillation. During the distillation practically the entire quantity of the substance is carried over within a temperature interval of 1° to 2°C. The yield approaches the theoretical amount. MP 68° to 69°C. BP 180° to 182°C at 4 mm Hg; 159° to 160°C at 2 mm Hg. (Procedure is from US Patent 2,441,498.)

brand name

Alpha caine Hydrochloride (Carlisle); Anestacon (Polymedica); Laryng-O-Jet (International Medication); Lidocaton (Phar maton); Lidopen (Meridian); Xylocaine (Abraxis); Xylo caine (AstraZeneca); Xylocaine (Dentsply).

Therapeutic Function

Local anesthetic, Antiarrhythmic

Biological Functions

Lidocaine hydrochloride (Xylocaine) is the most commonly used local anesthetic. It is well tolerated, and in addition to its use in infiltration and regional nerve blocks, it is commonly used for spinal and topical anesthesia and as an antiarrhythmic agent. Lidocaine has a more rapidly occurring, more intense, and more prolonged duration of action than does procaine.

General Description

Lidocaine hydrochloride,2-(diethylamino)-2 ,6 -acetoxylidide monohydrochloride(Xylocaine), was conceived as a derivative of gramine(3-dimethylaminomethylindole) and introduced as a localanesthetic. It is now being used intravenously as a standardparenteral agent for suppression of arrhythmias associatedwith acute myocardial infarction and cardiac surgery.It isthe drug of choice for the parenteral treatment of prematureventricular contractions.

Clinical Use

Lidocaine hydrochloride is a class IB antiarrhythmicagent with a different effect on the electrophysiologicalproperties of myocardial cells from that of procainamideand quinidine. It binds with equal affinity to the active (A)and inactive (I) Na+ ion channels. It depresses diastolic depolarizationand automaticity in the Purkinje fiber networkand increases the functional refractory period relative toaction potential duration, as do procainamide and quinidine.It differs from the latter two drugs, however, in that it doesnot decrease, and may even enhance, conduction velocity and increase membrane responsiveness to stimulation.There are fewer data available on the subcellular mechanismsresponsible for the antiarrhythmic actions of lidocainethan on the more established drug quinidine. It has been proposedthat lidocaine has little effect on membrane cation exchangeof the atria. Sodium ion entrance into ventricularcells during excitation is not influenced by lidocaine becauseit does not alter conduction velocity in this area.Lidocaine hydrochloride does depress Na+ influx duringdiastole, as do all other antiarrhythmic drugs, to diminishautomaticity in myocardial tissue. It also alters membraneresponsiveness in Purkinje fibers, allowing increased conductionvelocity and ample membrane potential at the timeof excitation.

Safety Profile

Poison by ingestion, intraperitoneal, intravenous, subcutaneous, intramuscular, and intratracheal routes. Human systemic effects: somnolence, respiratory depression, low blood pressure, cardiomyopathy includmg infarction, pulse rate increase. An experimental teratogen. Other experimental reproductive effects. A skin and eye irritant. An anesthetic. When heated to decomposition it emits very toxic fumes of NOx and HCl.

Lidocaine hydrochloride Preparation Products And Raw materials

Raw materials

Preparation Products

Lidocaine hydrochloride Suppliers

Global( 354)Suppliers
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Wuhan Mulei New Material Technology Co. Ltd
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86-0311-66562153 CHINA 2885 58
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Related articles

View Lastest Price from Lidocaine hydrochloride manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-12-06 Lidocaine hydrochloride CP2000,BP98
US $20.00 / KG 1KG 98% 1000kg/month Shanxi Lianxu New Material Co., LTD
2021-12-06 2-(Diethylamino)-N-(2,6-dimethylphenyl)-acetamide hydrochloride
US $25.00 / KG 1KG 99% 1000kg/month Shanxi Lianxu New Material Co., LTD
2021-12-06 Lidocaine hydrochloride
US $50.00 / ASSAYS 1ASSAYS 99% 500ton Shanghai Yunao International Trade Co., Ltd

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