Comparative Pharmacology
Head-to-head clinical analysis: LIMBITROL versus OXAZEPAM.
Peer-Reviewed Evidence
Head-to-head clinical analysis: LIMBITROL versus OXAZEPAM.
LIMBITROL vs OXAZEPAM
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Limbitrol is a combination of chlordiazepoxide (a benzodiazepine) and amitriptyline (a tricyclic antidepressant). Chlordiazepoxide enhances GABA-A receptor activity, producing anxiolytic and sedative effects. Amitriptyline inhibits serotonin and norepinephrine reuptake, elevating mood and reducing pain. The combination is used for depression with anxiety.
Binds to GABA-A receptor at benzodiazepine binding site, enhancing Cl- ion conductance and increasing inhibitory neurotransmission. Anxiolytic, sedative, hypnotic, anticonvulsant, and muscle relaxant effects.
1-2 tablets (5 mg chlordiazepoxide / 12.5 mg amitriptyline per tablet) orally 3-4 times daily. Maximum 6 tablets per day in divided doses.
10-30 mg orally 3-4 times daily; maximum 120 mg/day.
None Documented
None Documented
Clinical Note
moderateOxazepam + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Oxazepam is combined with Fluticasone propionate."
Clinical Note
moderateOxazepam + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Oxazepam."
Clinical Note
moderateOxazepam + Erythromycin
"The metabolism of Erythromycin can be decreased when combined with Oxazepam."
Clinical Note
moderateOxazepam + Cyclosporine
Amitriptyline: 20-30 hours (range 10-46 h) with a terminal elimination half-life of ~24 h; clinical significance requires 7-14 days to reach steady state. Chlordiazepoxide: 5-30 hours (up to 48 h for active metabolite desmethylchlordiazepoxide).
Terminal elimination half-life is 5-15 hours (mean 8 hours); no active metabolites, thus accumulation is minimal even with repeated dosing.
Renal (approximately 70-80% as metabolites, 1-3% unchanged) and fecal (20-30% via biliary elimination for chlordiazepoxide component; amitriptyline is primarily excreted renally as metabolites, 10-15% unchanged).
Renal (primarily as glucuronide conjugates, with less than 1% unchanged); biliary/fecal excretion is minimal.
Category C
Category D/X
Benzodiazepine/Tricyclic Antidepressant Combination
Benzodiazepine
"The metabolism of Cyclosporine can be decreased when combined with Oxazepam."