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Trimecaine

Trimecaine (systematic name (2,4,6-trimethylphenylcarbamoylmethyl)diethylammonium chloride, chemical formula C15H25ClN2O) is an organic compound used as a local anesthetic and cardial antiarrhythmic. It is white crystalline powder readily soluble in water and ethanol. It is an active ingredient in products available under trademarks Mesdicain, Mesocain, Mesokain and others.

History

Trimecaine is probably a Czech discovery (in light of complex pharmacological and clinical evaluation and practical deployment) although its preparation was published by Löfgren in 1946.

Action mechanism, pharmacokinetics

Like other local anesthetics belonging in the amide group trimecaine decreases the cell membrane permeability, causes depolarization and shortens the action potential. Anesthetic effect starts within 15 minutes and remains 60–90 minutes. Its biological half-life is ca. 90 minutes. 10% of trimecaine is excreted unchanged (90% as its metabolites). It passes through the hematoencephalic and placental barriers.

Indication

Trimecaine has two main application fields. The first one is local anesthesia (topical, infiltrational, topical mucosal and inhalational, spinal and Bier's intravenous). It is used in concentrations 0.4 up to 4%, in some cases (e.g. in stomatology) in mixtures with adrenaline. The other field is prophylaxis and therapy of ventriculous arrhythmia on myocardial infarction and in cardiosurgery. It is used also for prophylaxis of sympathetic reaction during tracheal intubations.

Contraindication

Trimecaine must not be used at hypersensitivity on amide anesthetics, hypervolemia, hypotension, cardial conduction defects, asystole, cardiogenic shock and malignant hyperthermia in anamnesis.

Adverse effects

Rarely allergic reactions may occur (from dermal or mucosal symptoms to anaphylactic shock). At overdosing a toxical reaction arises - excitation, agitation, dishevelment, visual defects, buzzing in ears, muscle thrill to tremor, in more severe cases somnolence, hyporeflexia, breathing defects to apnea, convulsions.

References

[http://www.lekopis.cz/Kap_6_1_Trimecaini_hydrochloridum.htm Trimecaini hydrochloridum - Český lékopis 1997]
[http://www.eurochem.cz/polavolt/org/abecedne/t/popisy/trimekain.htm Trimekain]
[https://www.zdravcentra.sk/cps/rde/xchg/zcsk/xsl/3141_17832.html Antiarytmika (Novák, M.)] {{Webarchive. link. (2007-08-10)
link. (2011-07-18)

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

local-anesthetics antiarrhythmic-agents acetanilides diethylamino-compounds

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