Comparative Pharmacology
Head-to-head clinical analysis: DIAZEPAM versus LIMBITROL.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DIAZEPAM versus LIMBITROL.
DIAZEPAM vs LIMBITROL
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Benzodiazepine that enhances GABA-A receptor activity by increasing the frequency of chloride channel opening, leading to neuronal hyperpolarization and inhibition.
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.
Anxiety: 2-10 mg PO BID-QID; Sedation/Muscle spasm: 5-10 mg IV/IM q3-4h PRN; Status epilepticus: 0.15-0.2 mg/kg IV (max 10 mg) q10-15 min PRN.
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
moderateDiazepam + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Diazepam is combined with Fluticasone propionate."
Clinical Note
moderateFludiazepam + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Fludiazepam is combined with Fluticasone propionate."
Clinical Note
moderateDiazepam + Tenofovir disoproxil
"The metabolism of Tenofovir disoproxil can be decreased when combined with Diazepam."
Clinical Note
moderateTerminal half-life 30-56 hours (range 20-70 hours) in adults; prolonged in elderly (up to 100 hours), neonates (up to 100 hours), and cirrhosis (up to 100+ hours).
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 (70-80% as metabolites, primarily glucuronide conjugates; <5% unchanged), fecal (10-20% as metabolites), 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
Diazepam + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Diazepam."