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Related Concept Videos

Sedatives and Hypnotics Drugs: Miscellaneous Agents01:17

Sedatives and Hypnotics Drugs: Miscellaneous Agents

Sedatives and hypnotics encompass a wide range of substances, each with its unique mechanism of action, uses, and potential adverse effects.
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...
Sedatives and Hypnotics: Overview01:23

Sedatives and Hypnotics: Overview

Sedatives are drugs that alleviate anxiety, while hypnotics induce sleep. Both classes of medication suppress neuronal activity, leading to a calming effect for sedatives and facilitating sleep for hypnotics.
Sedative-hypnotics are categorized into barbiturates, benzodiazepines (BZDs), and non-benzodiazepines or Z-drugs. These drugs work by suppressing central nervous system activity, and this suppression is dose-dependent. Older sedative medications, like barbiturates, follow a linear curve in...
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...
Anxiolytic Drugs: Benzodiazepines and Buspirone01:29

Anxiolytic Drugs: Benzodiazepines and Buspirone

Benzodiazepines are a class of anxiolytic drugs known for their rapid efficacy and high therapeutic-to-lethal dose ratio, but with a potential risk of drug dependence. These drugs are lipophilic, allowing for rapid absorption after oral administration, eventually reaching the central nervous system (CNS). Once in the CNS, benzodiazepines bind to the allosteric site of the GABAA receptor. This binding enhances the inhibitory effects of the neurotransmitter GABA. By doing so, they prevent...
Anxiolytic Drugs: Overview01:26

Anxiolytic Drugs: Overview

Anxiolytic drugs are vital in managing anxiety disorders by effectively alleviating symptoms such as excessive fear, tachycardia, and tremors. There are several classes of anxiolytic medications, each with unique mechanisms of action and potential side effects.
Primary Types of Anxiolytic Drugs
1. Benzodiazepines:
Benzodiazepines bind to the GABA-A receptor in the brain, enhancing GABA's interaction. This action reduces neurotransmission, effectively blocking anxiety-associated limbic circuitry.
Sedatives and Hypnotics Drugs: Barbiturates01:20

Sedatives and Hypnotics Drugs: Barbiturates

Sedatives and hypnotics encompass a drug class that acts on the central nervous system (CNS) to alleviate anxiety, promote relaxation and induce sleep.These drugs function by amplifying the actions of the neurotransmitter γ-aminobutyric acid (GABA), resulting in reduced neuronal activity. Barbiturates, a subset of sedatives and hypnotics first synthesized in the late 1800s, are categorized into ultra-short, short, intermediate, and long-acting groups based on their duration of effect. A key...

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Related Experiment Video

Updated: Jun 17, 2026

Polygraphic Recording Procedure for Measuring Sleep in Mice
08:45

Polygraphic Recording Procedure for Measuring Sleep in Mice

Published on: January 25, 2016

Anxiolytic and sedative drugs: Sleep modulation and memory implications.

Sara Marcoccia1, Giulia Chiacchierini1, Patrizia Campolongo1

  • 1Dept. of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy; Neuropharmacology Unit, IRCCS Santa Lucia Foundation, 00143 Rome, Italy.

Progress in Neuro-Psychopharmacology & Biological Psychiatry
|June 15, 2026
PubMed
Summary

Psychoactive drugs impact sleep architecture and memory consolidation differently. Some sedatives disrupt memory, while others like melatonin agonists offer selective sleep benefits without cognitive impairment.

Keywords:
AnxiolyticsDORAGABAMemorySedativesSleep

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High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster
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High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster

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Last Updated: Jun 17, 2026

Polygraphic Recording Procedure for Measuring Sleep in Mice
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Published on: January 25, 2016

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High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster

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Area of Science:

  • Neuropharmacology
  • Cognitive Neuroscience
  • Sleep Science

Background:

  • Sleep, encompassing Non-Rapid Eye Movement (NREM) and Rapid Eye Movement (REM) phases, is vital for memory consolidation.
  • Anxiolytics and sedatives modulate sleep architecture, influencing learning, synaptic plasticity, and neurophysiological activity.
  • Various drug classes target different neurotransmitter systems (GABAergic, serotonergic, dopaminergic, orexinergic), leading to diverse effects on memory.

Purpose of the Study:

  • To review how psychoactive agents, including hypnotics and sedatives, affect sleep-dependent memory processes.
  • To analyze the interplay between sleep modulation and cognitive outcomes.
  • To focus on studies using doses that induce clear hypnotic or sedative effects.

Main Methods:

  • Literature review of rodent studies on psychoactive compounds and their effects on sleep and memory.
  • Analysis of drugs acting on GABA-A, melatonin, orexin, cannabinoid, and opioid systems.
  • Focus on compounds with hypnotic or sedative effects.

Main Results:

  • GABAergic drugs (benzodiazepines, Z-drugs) significantly impact REM sleep and hippocampus-dependent memory.
  • Melatonin receptor agonists and orexin receptor antagonists show selective sleep influence with less memory disruption.
  • Cannabinoids and opioids exhibit complex, dose-dependent effects on memory consolidation, influenced by sleep deprivation.

Conclusions:

  • Pharmacological agents have varied impacts on sleep architecture and memory consolidation.
  • Understanding these effects is crucial for neuropharmacology and cognitive neuroscience.
  • Selective agents like melatonin agonists may offer therapeutic potential for sleep and memory disorders.