Please check your internet connection and try again.
# Lorazepam
## Overview
Lorazepam is a benzodiazepine with anxiolytic, sedative, hypnotic, amnestic, anticonvulsant, and muscle relaxant properties. It acts by enhancing the effect of the neurotransmitter gamma-aminobutyric acid (GABA) at the GABA-A receptor.
## Primary Indications
* Anxiety disorders
* Insomnia
* Status epilepticus
* Premedication for surgical procedures
* Management of agitation
## Adult Dosing
* **Anxiety:** 0.5-4 mg orally or IM divided every 8 hours.
* **Insomnia:** 2-4 mg orally at bedtime.
* **Status epilepticus (IV/IM):** 4 mg, may repeat in 5-10 minutes if seizures persist. Maximum 8 mg in 24 hours.
* **Premedication:** 2-4 mg IM 2 hours before surgery, or 1-4 mg IV just before induction.
* **Agitation:** 0.5-4 mg IM or IV.
Dosing varies significantly by indication and patient-specific factors.
## Pediatric Dosing
Dosing in pediatrics is less standardized and often requires careful titration.
* **Status epilepticus (IV/IM):** 0.05-0.1 mg/kg/dose every 5-10 minutes as needed, maximum 4 mg per dose. (Refer to local protocols for precise dosing and maximums).
* **Anxiety/Sedation:** Doses are highly variable and should be individualized.
## Dose Adjustments
* **Hepatic Impairment:** Use with caution; dosage reduction may be necessary.
* **Renal Impairment:** No specific dose adjustment is typically recommended, but caution is advised.
* **Elderly:** Start at the lower end of the dosage range and titrate slowly due to increased sensitivity and potential for side effects.
## Contraindications
* Known hypersensitivity to lorazepam or other benzodiazepines.
* Acute angle-closure glaucoma.
* Severe respiratory insufficiency.
* Severe hepatic insufficiency.
* Sleep apnea.
## Adverse Effects
* Drowsiness, dizziness, sedation, weakness, ataxia.
* Confusion, disorientation.
* Paradoxical reactions (e.g., excitement, rage).
* Respiratory depression (especially with IV administration or in combination with other CNS depressants).
* Hypotension (with IV administration).
* Amnesia.
* Abuse and dependence potential.
## Key Drug Interactions
* **CNS Depressants (e.g., opioids, alcohol, barbiturates, other sedatives/hypnotics):** Potentiated CNS depression, increased risk of respiratory depression, profound sedation, coma, and death. Use with extreme caution and consider dose reduction of one or both agents.
* **Theophylline/Aminophylline:** May reduce the sedative effects of lorazepam.
* **Valproic acid:** May increase lorazepam levels.
## Monitoring
* Level of consciousness, sedation, and respiratory status, especially with IV administration or in combination therapies.
* Signs and symptoms of withdrawal upon abrupt discontinuation.
* Signs of dependence or abuse.
* Mental status and effectiveness for indication.
## Clinical Pearls
* Intramuscular (IM) lorazepam is generally well-absorbed, but absorption can be slower and less predictable compared to intravenous (IV) administration.
* IV lorazepam should be administered slowly to minimize hypotension and respiratory depression.
* Withdrawal symptoms can occur with abrupt discontinuation, especially after prolonged use or high doses. Tapering is recommended.
* Lorazepam is often the benzodiazepine of choice in status epilepticus due to its relatively rapid onset and intermediate duration of action.
* Consider reduced doses in elderly patients and those with hepatic impairment.
***
**Disclaimer:** This information is intended for clinical use and is not a substitute for professional medical advice. Always consult the most current prescribing information, product monographs, or regulatory agency guidelines for complete and up-to-date information before making any treatment decisions. Protocols and local guidelines may dictate specific dosing and management strategies.
