Comparative Pharmacology
Head-to-head clinical analysis: ALPRAZOLAM versus LIBRIUM.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ALPRAZOLAM versus LIBRIUM.
ALPRAZOLAM vs LIBRIUM
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Positive allosteric modulator of GABA-A receptors; enhances GABA inhibitory neurotransmission by binding to benzodiazepine site on GABA-A receptor, increasing chloride ion conductance.
Binds to benzodiazepine site on GABA-A receptor, potentiating GABAergic inhibition and increasing chloride ion conductance.
0.25-0.5 mg orally 3 times daily; maximum 4 mg/day in divided doses.
5-25 mg orally 3-4 times daily; or 50-100 mg intramuscularly or intravenously initially, then 25-50 mg 3-4 times daily as needed.
None Documented
None Documented
12-15 hours (mean ~13 hours); prolonged in elderly (up to 19 hours) and hepatic impairment (up to 20-30 hours); clinical context: allows once- to twice-daily dosing, but risk of accumulation with high doses or in vulnerable populations
Clinical Note
moderateAlprazolam + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Alprazolam is combined with Fluticasone propionate."
Clinical Note
moderateAlprazolam + Haloperidol
"The risk or severity of adverse effects can be increased when Alprazolam is combined with Haloperidol."
Clinical Note
moderateAlprazolam + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Alprazolam."
Clinical Note
moderateAlprazolam + Erythromycin
Terminal elimination half-life of chlordiazepoxide is 24-48 hours; active metabolite desmethyldiazepam has half-life of 36-200 hours; with repeated dosing, effective half-life extends due to accumulation of active metabolites.
Renal (approximately 80% as metabolites, <20% unchanged); fecal (minor, ~7%)
Renal excretion of unchanged drug and metabolites (primarily glucuronide conjugates of chlordiazepoxide and demoxepam, <2% unchanged); approximately 60-70% of a dose appears in urine as metabolites, with 4-9% in feces via biliary elimination.
Category D/X
Category C
Benzodiazepine
Benzodiazepine
"The serum concentration of Erythromycin can be increased when it is combined with Alprazolam."