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Updated: Jul 30, 2026

Murine Model of Allergen Induced Asthma
Published on: May 14, 2012
Question 5: Magnesium Sulphate for Acute Asthma in children
R Aniapravan1, A Pullattayil2, K Al Ansari3
1Sidra Medicine, P O Box 26999, Doha, Qatar; Weill Cornell Medical College, Doha, Qatar.
Insights
Magnesium sulfate (MgSO4) is increasingly used for severe childhood asthma when initial treatments fail. This review synthesizes evidence on its use and potential mechanisms in acute pediatric asthma management.
Area of Science:
- Pediatric Emergency Medicine
- Respiratory Medicine
- Pharmacology
Background:
- Standard acute asthma treatment in children includes inhaled beta-agonists, oxygen, and systemic steroids.
- Evidence for secondary treatment options in severe pediatric asthma attacks is less defined.
- Intravenous magnesium sulfate (MgSO4) is frequently used, with nebulized forms emerging in initial therapy.
Purpose of the Study:
- To examine the role of magnesium sulfate (MgSO4) in acute asthma management in children.
- To explore the potential mechanisms of action for MgSO4 in pediatric asthma.
- To review current recommendations and evidence supporting MgSO4 use.
Main Methods:
- Literature review of studies on magnesium sulfate in acute pediatric asthma.
- Analysis of evidence for both nebulized and intravenous administration of MgSO4.
- Synthesis of current clinical recommendations and research findings.
Main Results:
- Discusses the potential physiological effects of MgSO4 in bronchodilation and reducing airway inflammation.
- Presents evidence supporting the efficacy of both intravenous and nebulized MgSO4 in specific pediatric asthma cohorts.
- Highlights variability in current treatment guidelines and practice.
Conclusions:
- Magnesium sulfate represents a valuable option for severe acute asthma in children unresponsive to initial therapies.
- Further research is needed to clarify optimal dosing, administration routes, and long-term effects.
- Standardizing the use of MgSO4 in pediatric asthma protocols requires robust evidence.
Abstract:
Most children who present to the emergency department with acute asthma, respond well to inhaled β2-agonists (spacer or nebuliser), oxygen (if required) and systemic steroids. Guidelines across the world agree on this simple, straight forward evidenced based approach. In children with more severe asthma attacks and those who do not respond to initial treatment, the evidence base for the secondary level treatment is less clear. Many regimens exist for the next step. Intravenous Magnesium Sulphate (MgSO4) is now used frequently in these situations and some centres are starting to use nebulized MgSO4 as part of the initial maximal inhaled therapy options. This paper examines the role of MgSO4 in acute asthma in children. It focusses on how MgSO4 might work, what are the current recommendations for use and then what is the current evidence base to support its use. We have presented the evidence for the use of both nebulized and intravenous MgSO4. At the end of the paper we have suggested future directions for research in this area. Our aim is to present a synthesis of the current role of MgSO4 in the management of an acute asthma attack.
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