Comparative Pharmacology
Head-to-head clinical analysis: CHLOROPROCAINE HYDROCHLORIDE versus LIDOCAINE VISCOUS.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHLOROPROCAINE HYDROCHLORIDE versus LIDOCAINE VISCOUS.
CHLOROPROCAINE HYDROCHLORIDE vs LIDOCAINE VISCOUS
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Blocks voltage-gated sodium channels in nerve cell membranes, inhibiting conduction of nerve impulses. Exhibits rapid onset and short duration due to hydrolysis by plasma pseudocholinesterase.
Lidocaine is an amide-type local anesthetic that blocks voltage-gated sodium channels (Nav1.7, Nav1.8) in neuronal membranes, inhibiting depolarization and propagation of action potentials, thereby producing local anesthesia. It also has antiarrhythmic properties (class IB) by blocking sodium channels in cardiac myocytes.
10-30 mL of 1% solution infiltrated locally; epidural: 15-25 mL of 2% or 3% solution, repeated as needed, not to exceed 800 mg total dose.
15 mL (300 mg) orally every 3 hours as needed for pain; maximum 8 doses per 24 hours.
None Documented
None Documented
Terminal elimination half-life of chloroprocaine is approximately 0.1-0.2 hours (6-12 minutes) in adults with normal pseudocholinesterase activity. This extremely short half-life accounts for its rapid clearance and short duration of action.
Terminal elimination half-life is 1.5–2 hours (up to 3 hours in hepatic impairment). Clinically, redistribution half-life (~6 min) determines duration of action after short infusions.
Primarily renal excretion of metabolites; unchanged drug undergoes rapid hydrolysis by plasma pseudocholinesterase, producing 2-chloro-4-aminobenzoic acid and diethylaminoethanol. Less than 2% excreted unchanged in urine. Biliary/fecal elimination is negligible.
Renal excretion of unchanged drug and metabolites accounts for >90% of elimination; <10% biliary/fecal. Metabolites include monoethylglycinexylidide (MEGX) and glycinexylidide (GX).
Category C
Category A/B
Local Anesthetic
Local Anesthetic / Antiarrhythmic (Class Ib)