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Related Concept Videos

Parenteral Anesthetics: Overview01:24

Parenteral Anesthetics: Overview

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Intravenous anesthetics are drugs administered parenterally to induce anesthesia or sedation. Propofol is a widely used agent formulated as a 1% emulsion in soybean oil, glycerol, and egg phosphatide. It induces rapid anesthesia primarily due to its rapid distribution from the bloodstream to target tissues and is metabolized in the liver. However, it can cause significant pain on injection and hypertriglyceridemia. Fospropofol, a water-based prodrug of propofol, lacks these adverse effects.
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Sedatives and Hypnotics Drugs: Miscellaneous Agents01:17

Sedatives and Hypnotics Drugs: Miscellaneous Agents

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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...
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Inhalational Anesthetics: Overview01:20

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Inhalation anesthetics are drugs that induce general anesthesia upon inhalation. They work by increasing the sensitivity of GABAA receptors or inhibiting NMDA receptors, leading to a decrease in central nervous system activity. The depth of anesthesia can be rapidly adjusted by changing the concentration of the inhaled gas. Some common examples of inhalational anesthetics include volatile liquids like isoflurane, desflurane, sevoflurane and gases like xenon and nitrous oxide. Isoflurane, a...
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Adrenergic Agonists: Indirect-Acting Agents01:25

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Indirect-acting adrenergic agonists potentiate the effects of endogenous catecholamines through different mechanisms without directly binding to adrenoceptors.
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
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Sedatives and Hypnotics: Overview01:23

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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...
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Chemotherapy-Induced Nausea and Vomiting: Dopamine Receptor Antagonists01:29

Chemotherapy-Induced Nausea and Vomiting: Dopamine Receptor Antagonists

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Dopamine receptor antagonists, also known as antipsychotic agents, are critical in managing chemotherapy-induced vomiting. These antiemetic agents block dopamine receptors in the chemoreceptor trigger zone (CTZ), inhibiting signal transmission to the vomiting center. Antipsychotic agents encompass phenothiazines (PTZ), butyrophenones, benzamides, and thienobenzodiazepines (Zyprexa), which are utilized for their antiemetic and sedative properties.
Phenothiazines, such as prochlorperazine...
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Updated: Jan 17, 2026

Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
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The novel etomidate analog: A potential induction agent.

Konica Chittoria1, Ankur Sharma2

  • 1Department of Anesthesiology and Critical Care, AIIMS, Jodhpur, Rajasthan, India.

Saudi Journal of Anaesthesia
|September 25, 2025
PubMed
Summary
This summary is machine-generated.

Methoxyethyl etomidate hydrochloride (ET-26) is a new anesthetic agent developed as an alternative to etomidate. It aims to retain etomidate

Keywords:
ET-26Etomidatemethoxyethyl etomidate hydrochloride

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Area of Science:

  • Anesthesiology
  • Pharmacology
  • Medicinal Chemistry

Background:

  • Etomidate is a preferred induction agent for anesthesia, especially in patients with cardiovascular compromise.
  • A significant limitation of etomidate is its adverse effect of adrenocortical suppression.
  • The need for an etomidate alternative with a similar efficacy but reduced side effects is critical.

Purpose of the Study:

  • To introduce and discuss methoxyethyl etomidate hydrochloride (ET-26) as a novel analog of etomidate.
  • To highlight ET-26's potential as an anesthetic agent with improved safety profile.

Main Methods:

  • This article focuses on the development and characteristics of ET-26.
  • Review of preclinical data and chemical properties of the new etomidate analog.

Main Results:

  • ET-26 is presented as a promising new etomidate analog.
  • The development addresses the critical need for an anesthetic agent that mitigates adrenocortical suppression.

Conclusions:

  • Methoxyethyl etomidate hydrochloride (ET-26) represents a significant advancement in anesthetic development.
  • ET-26 holds potential to overcome the limitations associated with traditional etomidate use.