Comparative Pharmacology
Head-to-head clinical analysis: CHLOROPROCAINE HYDROCHLORIDE versus POLOCAINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHLOROPROCAINE HYDROCHLORIDE versus POLOCAINE.
CHLOROPROCAINE HYDROCHLORIDE vs POLOCAINE
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.
Local anesthetic that stabilizes the neuronal membrane by inhibiting the influx of sodium ions, thereby blocking nerve impulse propagation.
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.
100 mg orally every 12 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 approximately 1.5-2.0 hours in adults; prolonged to 3-5 hours in hepatic impairment and neonates.
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.
Hepatic metabolism to 2,6-xylidine and 4-hydroxy-2,6-xylidine; <10% excreted unchanged in urine; approximately 70-80% of metabolites excreted renally, with <5% in feces.
Category C
Category C
Local Anesthetic
Local Anesthetic