Comparative Pharmacology
Head-to-head clinical analysis: LIDOCAINE HYDROCHLORIDE 0 4 IN DEXTROSE 5 versus TETRACAINE HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: LIDOCAINE HYDROCHLORIDE 0 4 IN DEXTROSE 5 versus TETRACAINE HYDROCHLORIDE.
LIDOCAINE HYDROCHLORIDE 0.4% IN DEXTROSE 5% vs TETRACAINE HYDROCHLORIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Lidocaine is a class IB antiarrhythmic agent that blocks voltage-gated sodium channels, inhibiting phase 0 depolarization and decreasing automaticity in ventricular myocardial cells. It also has local anesthetic properties by blocking nerve impulse conduction.
Tetracaine hydrochloride is a local anesthetic of the ester type that reversibly blocks nerve conduction by decreasing sodium ion permeability across the neuronal membrane, thereby stabilizing the membrane and preventing the initiation and transmission of nerve impulses.
Intravenous infusion: 1-4 mg/min (0.25-1 mL/min of 0.4% solution) after a loading dose of 1-1.5 mg/kg IV bolus for ventricular arrhythmias. Maximum total dose: 3 mg/kg.
Topical: 0.5-2% solution or ointment applied to affected area up to 4 times daily as needed. Maximum single dose: 20 mL of 2% solution (400 mg). Spinal anesthesia: 0.5% solution, 2-3 mL (10-15 mg) injected intrathecally.
None Documented
None Documented
Terminal elimination half-life is approximately 1.5-2 hours (mean 1.8 h) in healthy adults. In patients with hepatic impairment or heart failure, half-life may be prolonged to >3 hours. In neonates, half-life can be 3-6 hours.
Terminal elimination half-life is approximately 1.5–3 minutes in plasma due to rapid hydrolysis; clinical effect duration is dose-dependent (15–30 minutes for topical anesthesia).
Renal excretion of metabolites (primarily monoethylglycinexylidide and glycinexylidide) accounts for >90% of elimination. Less than 10% excreted unchanged in urine. Biliary/fecal excretion is negligible.
Primarily metabolized by plasma pseudocholinesterase; renal excretion of metabolites accounts for >95% of elimination, with <2% excreted unchanged in urine. Biliary/fecal elimination is negligible.
Category A/B
Category C
Local Anesthetic / Antiarrhythmic (Class Ib)
Local Anesthetic