Comparative Pharmacology
Head-to-head clinical analysis: CHLORZOXAZONE versus LIORESAL.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHLORZOXAZONE versus LIORESAL.
CHLORZOXAZONE vs LIORESAL
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Chlorzoxazone acts centrally on the spinal cord and subcortical areas of the brain to inhibit multisynaptic reflex arcs involved in producing and maintaining muscle spasm. It may also have some sedative effects.
GABA-B receptor agonist; inhibits monosynaptic and polysynaptic reflexes at the spinal cord level by reducing excitatory neurotransmitter release.
250-500 mg orally 3-4 times daily, maximum 750 mg 4 times daily.
Oral: Initial 5 mg 3 times daily, increase by 5 mg per dose every 3 days to a maximum of 80 mg/day (20 mg 4 times daily). Intrathecal: Test dose 50-100 mcg; maintenance infusion 300-800 mcg/day.
None Documented
None Documented
Terminal elimination half-life approximately 1–2 hours; clinically relevant for muscle relaxant effect duration.
Clinical Note
moderateChlorzoxazone + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Chlorzoxazone is combined with Fluticasone propionate."
Clinical Note
moderateChlorzoxazone + Haloperidol
"The metabolism of Haloperidol can be decreased when combined with Chlorzoxazone."
Clinical Note
moderateChlorzoxazone + Tenofovir disoproxil
"The metabolism of Tenofovir disoproxil can be decreased when combined with Chlorzoxazone."
Clinical Note
moderateChlorzoxazone + Sulfisoxazole
Terminal elimination half-life: 2.5-4 hours. Clinically, accumulation occurs in renal impairment, requiring dose adjustment.
Primarily hepatic metabolism followed by renal excretion of metabolites; <1% excreted unchanged in urine; minor biliary/fecal elimination.
Renal: approximately 70-80% of the dose as unchanged drug and metabolites (primarily glucuronide conjugate); minor biliary/fecal elimination (<5%).
Category C
Category C
Skeletal Muscle Relaxant
Skeletal Muscle Relaxant
"The metabolism of Sulfisoxazole can be decreased when combined with Chlorzoxazone."