Comparative Pharmacology
Head-to-head clinical analysis: LIDOCAINE HYDROCHLORIDE PRESERVATIVE FREE versus XYLOCAINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: LIDOCAINE HYDROCHLORIDE PRESERVATIVE FREE versus XYLOCAINE.
LIDOCAINE HYDROCHLORIDE PRESERVATIVE FREE vs XYLOCAINE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Lidocaine is a local anesthetic that stabilizes the neuronal membrane by inhibiting sodium ion channels, thereby blocking the initiation and conduction of nerve impulses. It also exhibits cardiac effects as a class IB antiarrhythmic agent by modulating sodium channels in myocardial cells.
Lidocaine binds to and inhibits voltage-gated sodium channels in the neuronal membrane, stabilizing the membrane and preventing the initiation and conduction of nerve impulses, thereby producing local anesthesia.
1-4 mg/kg via intravenous bolus, not to exceed 300 mg; may be followed by continuous infusion of 1-4 mg/min.
1-5 mg/kg (max 300 mg) local infiltration; epidural: 1-2% solution, 5-20 mL.
None Documented
None Documented
1.5–2 hours (terminal) in healthy adults; prolonged in hepatic impairment (up to 5–7 hours), heart failure (up to 10 hours), or with continuous infusion (>24 h) due to accumulation. Context: requires monitoring in hepatic or cardiac dysfunction to avoid toxicity.
Terminal elimination half-life is approximately 1.5 to 2 hours in adults, prolonged to 2-3 hours in patients with hepatic impairment, and may exceed 5 hours in neonates or patients with heart failure.
Renal: ~90% as metabolites (primarily monoethylglycinexylidide [MEGX] and glycinexylidide [GX]), <10% unchanged. Fecal: <1%.
Hepatic metabolism (primarily by CYP1A2 and CYP3A4) to metabolites, mainly monoethylglycinexylidide (MEGX) and glycinexylidide (GX); less than 10% excreted unchanged in urine. Renal excretion of metabolites: MEGX (70-80%) and GX (10-20%). Biliary/fecal elimination is minimal.
Category A/B
Category C
Local Anesthetic / Antiarrhythmic (Class Ib)
Local Anesthetic