Comparative Pharmacology
Head-to-head clinical analysis: CHLORZOXAZONE versus OZOBAX DS.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHLORZOXAZONE versus OZOBAX DS.
CHLORZOXAZONE vs OZOBAX DS
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.
Baclofen, a gamma-aminobutyric acid (GABA) analog, acts as an agonist at GABA-B receptors in the spinal cord, leading to decreased excitatory neurotransmitter release and reduced muscle spasticity.
250-500 mg orally 3-4 times daily, maximum 750 mg 4 times daily.
Adults: 600 mg orally twice daily; if efficacy not achieved after 2–3 weeks, may increase to 600 mg three times daily.
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 is 1.0-1.5 hours in patients with normal renal function; prolonged to 8-12 hours in moderate renal impairment (CrCl 30-50 mL/min) and up to 20-30 hours in severe renal impairment (CrCl <30 mL/min).
Primarily hepatic metabolism followed by renal excretion of metabolites; <1% excreted unchanged in urine; minor biliary/fecal elimination.
Renal: 70-80% unchanged; fecal: 20-30%; biliary: <5%
Category C
Category C
Skeletal Muscle Relaxant
Skeletal Muscle Relaxant
"The metabolism of Sulfisoxazole can be decreased when combined with Chlorzoxazone."