Comparative Pharmacology
Head-to-head clinical analysis: KLONOPIN versus LORAZEPAM.
Peer-Reviewed Evidence
Head-to-head clinical analysis: KLONOPIN versus LORAZEPAM.
KLONOPIN vs LORAZEPAM
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Benzodiazepine that binds to GABA-A receptors at the benzodiazepine binding site, enhancing the effect of GABA and increasing chloride ion influx, leading to neuronal hyperpolarization and decreased neuronal excitability.
Benzodiazepine that enhances GABA-A receptor activity by increasing frequency of chloride channel opening, leading to neuronal hyperpolarization and inhibition.
0.5 mg orally three times daily; maximum 20 mg/day
2-3 mg orally or IV, 3-4 times daily; maximum 10 mg/day. For anxiety, 0.5-2 mg orally 2-3 times daily. For procedural sedation, IV: 0.044 mg/kg or 2 mg total, may repeat.
None Documented
None Documented
30-40 hours in adults; prolonged in elderly (up to 50-80 hours) and hepatic impairment; clinical context: steady-state achieved in 5-10 days
Clinical Note
moderateLorazepam + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Lorazepam is combined with Fluticasone propionate."
Clinical Note
moderateLorazepam + Haloperidol
"The risk or severity of adverse effects can be increased when Lorazepam is combined with Haloperidol."
Clinical Note
moderateLorazepam + Probenecid
"The serum concentration of Probenecid can be increased when it is combined with Lorazepam."
Clinical Note
moderateLorazepam + Clemastine
Terminal elimination half-life is 12-18 hours. Clinically significant for once-daily dosing; may accumulate in elderly or hepatic impairment.
Renal excretion: ~50-70% as glucuronide metabolites, ~30% as unchanged drug (with enterohepatic recirculation); fecal: <2%
Primarily renal excretion as glucuronide conjugates; less than 1% excreted unchanged. Approximately 60-80% eliminated in urine, with 15-20% in feces.
Category C
Category D/X
Benzodiazepine
Benzodiazepine
"The risk or severity of adverse effects can be increased when Lorazepam is combined with Clemastine."