Comparative Pharmacology
Head-to-head clinical analysis: CLONAZEPAM versus LIMBITROL.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CLONAZEPAM versus LIMBITROL.
CLONAZEPAM vs LIMBITROL
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Enhances GABA-A receptor inhibitory neurotransmission by binding to benzodiazepine binding site, increasing frequency of chloride channel opening, leading to neuronal hyperpolarization.
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.
0.5 mg orally three times daily; maximum 20 mg/day
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.
None Documented
None Documented
Clinical Note
moderateClonazepam + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Clonazepam."
Clinical Note
moderateClonazepam + Erythromycin
"The metabolism of Erythromycin can be decreased when combined with Clonazepam."
Clinical Note
moderateClonazepam + Cyclosporine
"The metabolism of Cyclosporine can be decreased when combined with Clonazepam."
Clinical Note
moderateClonazepam + Fluconazole
Terminal elimination half-life: 19-60 hours (mean 30-40 hours); clinical context: long-acting benzodiazepine, allows once or twice daily dosing; accumulation occurs with repeated use.
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).
Renal: 50-70% as metabolites (mostly glucuronide conjugates), <2% unchanged; fecal: 10-20%; biliary: minor.
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).
Category D/X
Category C
Benzodiazepine
Benzodiazepine/Tricyclic Antidepressant Combination
"The metabolism of Fluconazole can be decreased when combined with Clonazepam."