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Related Concept Videos

Sedatives and Hypnotics Drugs: Benzodiazepines01:19

Sedatives and Hypnotics Drugs: Benzodiazepines

Benzodiazepines have both sedative and hypnotic properties. They include compounds such as diazepam (Valium) and alprazolam (Xanax). Structurally, their cores are similar, consisting of the fusion of a benzene ring and a diazepine ring, but they share a common mechanism of action in the central nervous system (CNS).
Benzodiazepines work by enhancing the effects of the inhibitory neurotransmitter GABA. They bind to the GABAA receptor, increasing its affinity for GABA, which opens chloride...
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Sedatives and Hypnotics Drugs: Miscellaneous Agents

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Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
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CNS Depressants: Barbiturates and Benzodiazepines

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Sedatives and Hypnotics: Overview01:23

Sedatives and Hypnotics: Overview

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Updated: May 13, 2026

Urethral Stricture Induction Followed by Buccal Mucosa Graft Urethroplasty in a Rat Model
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[Flumazenil].

Ju Mizuno1

  • 1Department of Anesthesiology and Intensive Care Unit, Teikyo University School of Medicine, Tokyo 173-8605.

Masui. the Japanese Journal of Anesthesiology
|February 26, 2013
PubMed
Summary
This summary is machine-generated.

Flumazenil effectively reverses benzodiazepine effects at gamma-amino butyric acid receptors. Caution is advised for patients with co-ingested antidepressants due to seizure risk.

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Area of Science:

  • Pharmacology
  • Neuroscience

Context:

  • Benzodiazepines are commonly used for sedation and anesthesia.
  • Flumazenil is an antagonist to benzodiazepines at gamma-amino butyric acid receptors.

Purpose:

  • To describe the role of flumazenil as an antagonist to benzodiazepines.
  • To highlight its diagnostic and therapeutic applications.
  • To warn about potential adverse effects.

Summary:

  • Flumazenil, an imidazobenzodiazepine derivative, antagonizes the hypnotic and sedative effects of benzodiazepines.
  • It can effectively and safely reverse benzodiazepine-induced anesthesia and is used diagnostically for suspected intoxication.
  • Seizures are a potential complication, particularly in patients with co-ingested tricyclic/tetracyclic antidepressants.

Impact:

  • Flumazenil provides a crucial reversal agent for benzodiazepine effects.
  • Its use requires careful consideration of patient history to mitigate seizure risks.
  • Intravenous administration in small, incremental doses is recommended for safe and effective recovery.