What are benzodiazepines used for?

Benzodiazepines are used for anxiety disorders, insomnia, alcohol withdrawal syndrome, seizures (status epilepticus), procedural sedation, muscle relaxation, and preoperative anxiolysis. Different agents are preferred for different indications based on onset, duration, and metabolite profile.

How do you identify a benzodiazepine by its generic name?

Most benzodiazepines end in the INN suffix -azepam (diazepam, lorazepam, temazepam, oxazepam, flurazepam, clorazepate) or -azolam (alprazolam, triazolam, midazolam). If a drug name ends in -azepam or -azolam, it is almost certainly a benzodiazepine.

Which benzodiazepines are safe in liver disease?

Lorazepam, oxazepam, and temazepam (the LOT mnemonic) are safe in hepatic impairment because they undergo only glucuronide conjugation without hepatic CYP oxidation. Other benzodiazepines should be used cautiously in liver disease.

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Benzodiazepines: Complete Pronunciation Guide

Benzodiazepines — identified by the INN suffixes -azepam and -azolam — are among the most widely prescribed CNS depressants in the world. They enhance the inhibitory effect of GABA at GABA-A receptors, producing sedation, anxiolysis, anticonvulsant activity, and muscle relaxation. Used across emergency medicine, psychiatry, anesthesia, neurology, addiction medicine, and primary care, correct pronunciation of benzodiazepines is essential for verbal orders, patient counseling, and interprofessional communication.

Diazepam

dye-AZ-e-pam

Valium • Diastat

Long-acting (t½ 20–100h + active metabolites). Prototype benzodiazepine. IV/IM/rectal. Status epilepticus, alcohol withdrawal, muscle spasm, anxiety.

Lorazepam

lor-AZ-e-pam

Ativan

Intermediate-acting. No active metabolites. Safe in liver disease (LOT). First-line IV benzodiazepine for status epilepticus. Anxiety, procedural sedation.

Alprazolam

al-PRAY-zoe-lam

Xanax • Xanax XR

Short-to-intermediate-acting. Most prescribed psychiatric drug in the US. Anxiety disorders, panic disorder. High abuse potential. CYP3A4 substrate.

Clonazepam

kloe-NAZ-e-pam

Klonopin

Long-acting. Approved for panic disorder and seizures (absence, Lennox-Gastaut). Unusually high anticonvulsant potency relative to sedative effect.

Midazolam

MID-a-zoe-lam

Versed • Nayzilam

Ultra-short-acting. Water-soluble at pH <4 (IM-compatible). Procedural sedation, anesthesia induction, status epilepticus (intranasal/buccal). Anterograde amnesia.

Temazepam

tem-AZ-e-pam

Restoril

Short-to-intermediate-acting (t½ 8–20h). No active metabolites. Safe in liver disease (LOT). Insomnia — improves sleep onset and maintenance.

Oxazepam

ox-AZ-e-pam

Serax

Short-acting. Glucuronide conjugation only. Safe in liver disease (LOT). Anxiety, alcohol withdrawal. LOT mnemonic — the only three benzos safe in hepatic impairment.

Chlordiazepoxide

klor-dye-AZ-e-POX-ide

Librium

The first benzodiazepine (1960). Long-acting (t½ 24–100h + active metabolites). Self-tapering pharmacokinetics make it useful for alcohol withdrawal syndrome.

Triazolam

try-AZ-oh-lam

Halcion

Ultra-short-acting (t½ 2–5h). No active metabolites. Sleep-onset insomnia. Higher potency than most benzodiazepines. Documented anterograde amnesia at higher doses.

Flurazepam

flur-AZ-e-pam

Dalmane

Long-acting via active metabolite desalkylflurazepam (t½ 47–100h). Insomnia. Beers Criteria: avoid in elderly. Significant next-day sedation and fall risk.

Clorazepate

klor-AZ-e-payt

Tranxene

Prodrug converted to nordiazepam in GI tract. Long-acting. Anxiety, alcohol withdrawal, adjunctive therapy for partial seizures. pH-dependent absorption: antacids reduce efficacy.

Clobazam

KLOE-ba-zam

Onfi • Sympazan

1,5-benzodiazepine (structural isomer). Adjunctive therapy for Lennox-Gastaut syndrome seizures. Less sedating than classic 1,4-benzodiazepines.

What Are Benzodiazepines?

Benzodiazepines are a class of psychoactive drugs that act as positive allosteric modulators of the GABA-A receptor. They bind to a specific site on the receptor (distinct from the GABA binding site) and increase the frequency of chloride ion channel opening in response to GABA, hyperpolarizing the neuron and producing CNS depression. The clinical effects — sedation, anxiolysis, anticonvulsant activity, and muscle relaxation — all result from this enhanced inhibitory neurotransmission.

The name benzodiazepine describes the chemical structure: a benzene ring fused to a diazepine ring (a seven-membered ring containing two nitrogen atoms). Most clinically used agents also contain a 5-aryl substituent and a 1,2-fused ring system. The triazolo-benzodiazepines (alprazolam, triazolam, midazolam) have an additional triazole ring that increases receptor affinity and potency.

How to Identify a Benzodiazepine by Name

The INN (International Nonproprietary Name) system assigns two primary suffixes to benzodiazepines: -azepam (diazepam, lorazepam, temazepam, oxazepam, flurazepam, clonazepam, clorazepate) and -azolam (alprazolam, triazolam, midazolam). The prefix often encodes chemical structure: chlor- (chlorine atom), flu(r)- (fluorine), clo- (chloro-), tri- (triazole ring). The stress pattern for virtually all -azepam drugs is identical: stress falls on the syllable immediately before “-azepam” (dye-AZ-e-pam, lor-AZ-e-pam, tem-AZ-e-pam).

Benzodiazepine Classification by Duration

Ultra-Short-Acting (<6h)

Triazolam (t½ 2–5h), midazolam (t½ 1–4h). Rapid onset and offset. Sleep-onset insomnia, procedural sedation. High rebound risk.

Short-to-Intermediate-Acting (6–24h)

Lorazepam (t½ 10–20h), oxazepam (t½ 4–15h), temazepam (t½ 8–20h), alprazolam (t½ 6–20h). Anxiety, insomnia, alcohol withdrawal.

Long-Acting (>24h)

Diazepam (t½ 20–100h + active metabolites), chlordiazepoxide (t½ 24–100h), clonazepam (t½ 19–60h), flurazepam (active metabolite t½ 47–100h), clorazepate (active metabolite nordiazepam t½ 40–99h).

The LOT Mnemonic: Safe in Liver Disease

Three benzodiazepines are safe in hepatic impairment because they undergo only phase II glucuronide conjugation (no CYP oxidation): Lorazepam, Oxazepam, and Temazepam. The mnemonic LOT (or sometimes GOT — Got Only Two) is a classic pharmacology teaching tool. All other benzodiazepines require hepatic CYP oxidation and may accumulate dangerously in liver disease.