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# Lorazepam
## Overview
Lorazepam is a short-acting benzodiazepine with anxiolytic, sedative, hypnotic, amnestic, and anticonvulsant properties.
## Primary Indications
* Anxiety disorders
* Insomnia (short-term treatment)
* Seizures (e.g., status epilepticus)
* Preoperative sedation
* Management of agitation
## Adult Dosing
* **Anxiety:** Typically 0.5 mg to 2 mg orally two to three times daily. Maximum dose generally not to exceed 10 mg per day.
* **Insomnia:** 2 mg to 4 mg orally at bedtime.
* **Status Epilepticus:** 4 mg intravenously (IV) or intramuscularly (IM). May repeat dose after 5-10 minutes if seizures persist, not to exceed 8 mg in a 12-hour period.
* **Preoperative Sedation:** 2 mg to 4 mg IM given 2 hours before surgery.
* **Agitation:** 0.5 mg to 2 mg orally or IM every 4-6 hours as needed.
Specific dosing for procedural sedation or critical care settings may vary based on protocol.
## Pediatric Dosing
Dosing in pediatric patients is highly variable and should be individualized based on age, weight, and clinical condition. There is limited established pediatric dosing data for many indications.
* **Status Epilepticus:** Typically 0.1 mg/kg IV/IM, maximum of 4 mg per dose. May repeat once after 5-10 minutes if needed.
Consult specific pediatric guidelines or institutional protocols for detailed dosing.
## Dose Adjustments
* **Hepatic Impairment:** Use with caution. Lower doses may be necessary.
* **Renal Impairment:** No specific dose adjustment, but use with caution due to potential accumulation.
## Contraindications
* Hypersensitivity to benzodiazepines or any component of the formulation.
* Acute narrow-angle glaucoma.
* Severe respiratory insufficiency.
* Severe hepatic insufficiency.
* Sleep apnea.
## Adverse Effects
Common: Drowsiness, dizziness, sedation, unsteadiness, weakness, fatigue.
Less Common: Confusion, depression, amnesia, paradoxical excitation, respiratory depression (especially with IV administration or in combination with other CNS depressants).
## Key Drug Interactions
* **CNS Depressants (e.g., opioids, alcohol, other sedatives):** Increased risk of profound sedation, respiratory depression, coma, and death.
* **CYP3A4 Inhibitors/Inducers:** Lorazepam is primarily metabolized by glucuronidation, not significantly by CYP enzymes, so major CYP-mediated interactions are less likely compared to other benzodiazepines. However, co-administration with agents affecting glucuronidation could theoretically alter lorazepam's metabolism.
## Monitoring
* Level of sedation and respiratory status, especially after IV administration or in patients with risk factors.
* Signs of dependence and withdrawal symptoms with prolonged use.
* Effectiveness for the treated condition.
## Clinical Pearls
* Lorazepam is often the benzodiazepine of choice in status epilepticus due to its intermediate half-life and IM absorption.
* Avoid abrupt discontinuation after prolonged use; taper dose gradually to prevent withdrawal symptoms.
* The elderly are more sensitive to the sedative and ataxic effects. Use lower doses and monitor closely.
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*This information is intended for healthcare professionals. Always consult the most current prescribing information and institutional protocols for definitive guidance.*
