Comparative Pharmacology
Head-to-head clinical analysis: LIMBITROL DS versus MIDAZOLAM.
Peer-Reviewed Evidence
Head-to-head clinical analysis: LIMBITROL DS versus MIDAZOLAM.
LIMBITROL DS vs MIDAZOLAM
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Limbitrol DS is a combination of amitriptyline (a tricyclic antidepressant) and chlordiazepoxide (a benzodiazepine). Amitriptyline inhibits the reuptake of serotonin and norepinephrine, enhancing neurotransmission in the CNS. Chlordiazepoxide binds to GABA-A receptors, potentiating GABAergic inhibitory effects, leading to anxiolytic and sedative effects.
Midazolam is a benzodiazepine that potentiates gamma-aminobutyric acid (GABA) activity by binding to the benzodiazepine site on GABA-A receptors, enhancing GABA's inhibitory effects, leading to increased chloride ion conductance, hyperpolarization, and neuronal inhibition.
1 tablet (amitriptyline 25 mg/chlordiazepoxide 10 mg) orally 3 times daily initially, gradually increasing to 2 tablets orally 3 times daily or 3 tablets orally twice daily if needed; maximum 6 tablets per day.
IV: 0.5-2 mg initial, titrate by 0.5-1 mg increments every 2-3 min; typical total 2.5-5 mg. IM: 0.07-0.08 mg/kg (usual 5 mg). Oral: 7.5-15 mg as a single premedication dose.
None Documented
None Documented
Clinical Note
moderateMidazolam + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Midazolam is combined with Fluticasone propionate."
Clinical Note
moderateMidazolam + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Midazolam."
Clinical Note
moderateMidazolam + Erythromycin
"The serum concentration of Erythromycin can be increased when it is combined with Midazolam."
Clinical Note
moderateMidazolam + Cyclosporine
Chlordiazepoxide: 5-30 hours (parent drug), active metabolite (desmethylchlordiazepoxide) 10-30 hours; amitriptyline: 13-36 hours (parent), nortriptyline (active metabolite) 18-44 hours. Half-lives increase with age and hepatic impairment.
Terminal elimination half-life: 1.5-2.5 hours in healthy adults; prolonged in elderly (5-6 hours), obesity, hepatic cirrhosis (up to 20 hours), and critical illness.
Renal: 70-80% as conjugated metabolites, <5% unchanged; fecal: 10-20% via biliary excretion.
Renal: approximately 45-57% as metabolites (primarily 1-hydroxymidazolam glucuronide) and <1% unchanged; fecal: 2-10% via biliary excretion.
Category C
Category D/X
Benzodiazepine/Tricyclic Antidepressant Combination
Benzodiazepine
"The metabolism of Cyclosporine can be decreased when combined with Midazolam."