Comparative Pharmacology
Head-to-head clinical analysis: LARYNGOTRACHEAL ANESTHESIA KIT versus LIDOCAINE HYDROCHLORIDE 0 2 AND DEXTROSE 5 IN PLASTIC CONTAINER.
Peer-Reviewed Evidence
Head-to-head clinical analysis: LARYNGOTRACHEAL ANESTHESIA KIT versus LIDOCAINE HYDROCHLORIDE 0 2 AND DEXTROSE 5 IN PLASTIC CONTAINER.
LARYNGOTRACHEAL ANESTHESIA KIT vs LIDOCAINE HYDROCHLORIDE 0.2% AND DEXTROSE 5% IN PLASTIC CONTAINER
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Lidocaine and tetracaine are sodium channel blockers, inhibiting nerve impulse conduction, providing local anesthesia. Epinephrine is a vasoconstrictor that reduces systemic absorption and prolongs duration.
Lidocaine is a sodium channel blocker that stabilizes neuronal membranes by inhibiting the ionic fluxes required for initiation and conduction of impulses, thereby producing local anesthesia. Dextrose 5% provides caloric support.
4 mL of 4% lidocaine (160 mg) via atomizer or nebulizer for topical laryngotracheal anesthesia, with additional 2 mL aliquots as needed, not to exceed 4.5 mg/kg total dose.
Intravenous administration: Initial dose of 1-1.5 mg/kg (up to 300 mg total) given at a rate not exceeding 50 mg/min. Followed by continuous infusion at 1-4 mg/min (20-50 mcg/kg/min) for arrhythmia management.
None Documented
None Documented
Lidocaine terminal half-life: 1.5–2 hours (normal hepatic function); prolonged to 3–5 hours in heart failure or hepatic disease. Tetracaine: 2–3 hours.
Terminal elimination half-life: 1.5–2 hours (prolonged to 2–3 hours in hepatic impairment; unchanged in renal impairment).
Renal excretion of lidocaine and its metabolites (primarily monoethylglycinexylidide (MEGX) and glycinexylidide (GX)); <10% unchanged. Biliary/fecal excretion minimal (<5%).
Renal excretion of unchanged drug and metabolites: 10% unchanged, 90% as metabolites (primarily 4-hydroxy-2,6-xylidine and glycylxylidide). Less than 1% biliary/fecal.
Category C
Category A/B
Local Anesthetic
Local Anesthetic / Antiarrhythmic (Class Ib)