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Related Concept Videos

Adrenergic Agonists: Therapeutic Uses01:30

Adrenergic Agonists: Therapeutic Uses

Adrenergic agonists have diverse therapeutic uses across various medical conditions and emergencies.
Emergency and Intensive Care Unit (ICU) applications: Pressor agents increase blood pressure, heart rate, and contractility in shock and organ failure situations. Dopamine can induce vasodilation and stimulate adrenoceptors. Endogenous catecholamines are effective in treating cardiogenic shock. α2-agonists like clonidine can reverse anesthesia-induced hypertension.
Allergies and anaphylaxis:...
Antiasthma Drugs: β2-Adrenoceptor Agonists01:25

Antiasthma Drugs: β2-Adrenoceptor Agonists

Bronchodilators are critical in managing asthma, a chronic respiratory condition characterized by airway constriction due to inflammation and hyper-reactivity. Specifically, bronchodilators ease this constriction by relaxing the bronchial muscles, facilitating easier breathing.
One class of bronchodilators includes β2-adrenoceptor agonists. These agents target the β2-adrenoceptors located on bronchial smooth muscle cells. By stimulating these receptors, β2-agonists induce relaxation in these...
Adrenergic Agonists: Therapeutic Classification01:18

Adrenergic Agonists: Therapeutic Classification

Adrenergic agonists can be classified based on their therapeutic uses and mechanisms of action. They serve various purposes in clinical applications.
Vasopressor or pressor agents: They increase blood pressure and function as cardiac stimulants. Examples include endogenous catecholamines (norepinephrine and dopamine) and synthetic agents (phenylephrine).
Bronchodilators: β2-agonists can relax bronchial muscles and widen airways. They are commonly used for treating obstructive pulmonary...
Drugs Used in Lower Respiratory Disorders: Overview01:17

Drugs Used in Lower Respiratory Disorders: Overview

Lower respiratory tract disorders present challenges that often require skilled and nuanced approaches for effective management. Common ailments, such as asthma and chronic obstructive pulmonary disease (COPD), have prompted the development of intricate treatment strategies involving bronchodilators and anti-inflammatory drugs, each tailored to ease breathing and revitalize the lungs.
Bronchodilators, the first step of respiration enhancement, come in various forms, each with its own mechanism...
Asthma-IV: Diagnostic and Management01:30

Asthma-IV: Diagnostic and Management

The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
Clinical Assessment for Asthma:
This is the first step in diagnosing and managing asthma. It includes:
Adrenergic Agonists: Mixed-Action Agents01:28

Adrenergic Agonists: Mixed-Action Agents

Mixed-action adrenergic agonists, like ephedrine and pseudoephedrine, directly and indirectly affect adrenergic receptors. These agents stimulate adrenoceptors and indirectly release stored neurotransmitters, amplifying the adrenergic response.
Ephedrine and pseudoephedrine lack a catecholamine group, making them less susceptible to degradation by metabolic enzymes. They have increased oral bioavailability and lipophilicity, resulting in a longer duration of action. Their response is reduced by...

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Related Experiment Video

Updated: May 31, 2026

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma
14:39

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

Published on: November 4, 2010

Epinephrine for bronchiolitis.

Lisa Hartling1, Liza M Bialy, Ben Vandermeer

  • 1Department of Pediatrics, University of Alberta, Aberhart Centre One, Room 9424, 11402 University Avenue, Edmonton, Alberta, Canada, T6G 2J3.

The Cochrane Database of Systematic Reviews
|June 17, 2011
PubMed
Summary
This summary is machine-generated.

Epinephrine effectively reduces short-term hospital admissions for young children with acute viral bronchiolitis, especially within 24 hours. Combined epinephrine and steroid therapy may offer later benefits, warranting further research.

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Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma
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Area of Science:

  • Pediatric Pulmonology
  • Critical Care Medicine
  • Evidence-Based Medicine

Background:

  • Bronchodilators are frequently used for acute bronchiolitis in children, but their effectiveness is not well-established.
  • Acute viral bronchiolitis is a common respiratory illness in infants and young children.

Purpose of the Study:

  • To evaluate the efficacy and safety of epinephrine in treating acute viral bronchiolitis in children under two years old.
  • To compare epinephrine with placebo and other bronchodilators for pediatric bronchiolitis.

Main Methods:

  • Systematic review and meta-analysis of randomized controlled trials (RCTs) identified through comprehensive database searches.
  • Inclusion criteria focused on children under two with acute viral bronchiolitis, comparing epinephrine to placebo or other interventions.
  • Primary outcomes included admission rates and length of stay; secondary outcomes covered clinical severity, symptoms, and adverse events.

Main Results:

  • Epinephrine significantly reduced Day 1 admissions for outpatients compared to placebo, but not Day 7 admissions.
  • Inpatients receiving epinephrine had a shorter length of stay compared to salbutamol.
  • Combined epinephrine and steroid therapy showed a reduced Day 7 admission rate versus placebo in one RCT; no significant adverse events were noted.

Conclusions:

  • Epinephrine demonstrates superiority over placebo for short-term outcomes in outpatients with acute bronchiolitis.
  • Evidence suggests potential benefits of combined epinephrine and steroid therapy for later outcomes, requiring further investigation.
  • Current evidence does not support the effectiveness of repeated or prolonged use of epinephrine or combined epinephrine and dexamethasone in inpatients.