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# Lorazepam
## Overview
Lorazepam is a short-acting benzodiazepine with anxiolytic, sedative, hypnotic, amnestic, anticonvulsant, and muscle relaxant properties.
## Primary Indications
* Anxiety disorders
* Insomnia characterized by difficulty with sleep initiation or maintenance
* Status epilepticus
* Preanesthetic medication
## Adult Dosing
* **Anxiety:** 0.5 mg to 2 mg orally three times daily. Maximum typically 4 mg/day, but may be higher in select patients under close observation.
* **Insomnia:** 2 mg to 4 mg orally at bedtime.
* **Status Epilepticus:** 4 mg intravenously (IV) or intramuscularly (IM) initially. May repeat 4 mg every 5-10 minutes as needed. Maximum dose is generally 8 mg.
* **Preanesthetic Medication:** 2 mg to 4 mg IM given 2 hours before surgery.
Dosing for specific indications may vary based on institutional protocols.
## Pediatric Dosing
* **Anxiety:** Dosing is not well-established. Use with caution.
* **Status Epilepticus:** 0.05 mg/kg IV/IM, not to exceed 4 mg per dose. May repeat every 5-10 minutes. Maximum dose is generally 8 mg.
## Dose Adjustments
* **Hepatic Impairment:** Use with caution; may require dose reduction.
* **Renal Impairment:** No specific dose adjustment recommended, but use with caution.
* **Elderly:** Reduce initial doses by 50% and titrate cautiously due to increased sensitivity and risk of adverse effects.
## Contraindications
* Known hypersensitivity to benzodiazepines
* Acute narrow-angle glaucoma
* Severe respiratory insufficiency
* Severe hepatic insufficiency
* Myasthenia gravis
* Sleep apnea syndrome
## Adverse Effects
Common: Drowsiness, dizziness, weakness, unsteadiness, fatigue.
Serious: Respiratory depression, paradoxical reactions (e.g., excitement, aggression), amnesia, dependence, withdrawal symptoms.
## Key Drug Interactions
* **CNS Depressants (e.g., alcohol, opioids, other sedatives):** Additive CNS depression, increased risk of respiratory depression and profound sedation. Concomitant use with opioids requires caution and consideration of dose reduction of one or both agents.
* **Valproic acid:** May increase lorazepam levels and risk of toxicity.
* **Theophylline/Aminophylline:** May decrease sedative effects of lorazepam.
## Monitoring
* Monitor for sedation, respiratory rate, and oxygen saturation, especially with IV administration or in combination with other CNS depressants.
* Assess for signs of withdrawal if discontinuing after prolonged use.
* Evaluate for paradoxical reactions.
## Clinical Pearls
* Lorazepam is often used for its rapid onset of action, particularly in acute situations like status epilepticus or severe anxiety.
* Due to its intermediate half-life, it is less likely to cause significant daytime sedation compared to longer-acting benzodiazepines.
* Avoid abrupt discontinuation to prevent withdrawal symptoms. Tapering is recommended for patients on long-term therapy.
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*This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and relevant clinical guidelines before administering this medication.*
