Efficacy of High-Dose Continuous Intravenous Magnesium Sulfate Infusion vs Standard Intravenous Magnesium Sulfate Therapy in Status Asthmaticus in the ED (HIMAG-ED-STAT)

August 27, 2026 updated by: Kumpol Kornthatchapong, Thammasat University

Efficacy of High-Dose Continuous Intravenous Magnesium Sulfate Infusion Compared With Standard Intravenous Magnesium Sulfate Therapy in Patients With Status Asthmaticus in the Emergency Department

The goal of this clinical is to compare treatment outcomes between high dose continuous IV Magnesium and standard therapy in the management of acute exacerbation of asthma in the emergency department. Participants will random assign to either high dose continuous IV drip or standard infusion. Participants in the intervention group received high-dose 50% magnesium sulfate (MgSO4), consisting of 2 g + normal saline (NSS) 100 ml administered intravenously over 30 minutes, followed by MgSO4 6 g + NSS 350 ml infused over 3.5 hours (approximately 40-50 mg/kg/h). In contrast, participants in the control group received standard-dose 50% MgSO4, consisting of 2 g + NSS 100 ml administered intravenously over 30 minutes, followed by a NSS 350 ml infusion over 3.5 hours. Measurements include symptom severity, respiratory rate, oxygen saturation, and pulmonary function tests. Primary endpoints are ED stay length, hospital admission, and ED revisit within 48 hours post-discharge. Adverse events are documented.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
72

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.
  • Name: Kumpol Kornthatchapong, Associated Professor, MD.Ph.D.
  • Phone Number: +6629269316
  • Email: kump29@gmail.com

Study Contact Backup

  • Name: Department of Emergency Medicine Faculty of Medicine
  • Phone Number: +6629269316
  • Email: kump29@gmail.com

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Adults aged ≥18 years with a known diagnosis of asthma, and
  • Presence of signs and symptoms consistent with acute asthma exacerbation, including dyspnea, tachypnea, respiratory distress, chest tightness, cough, or wheezing, and
  • Indication for administration of intravenous magnesium sulfate (MgSO4)

Exclusion Criteria:

  • Patients requiring endotracheal intubation at the time of initial presentation
  • Hypermagnesemia (more than 2.5 mg/dL)
  • Known hypersensitivity to magnesium sulfate
  • Diagnosed or suspected myasthenia gravis or neuromuscular disease
  • Suspected infection meeting the criteria for patients under investigation (PUI) for coronavirus disease 2019 (COVID-19)
  • Suspected or confirmed pulmonary tuberculosis
  • inability to perform pulmonary function testing (spirometry or peak expiratory flow)
  • known case chronic kidney disease (eGFR <30 mL/min/1.73 m²), heart block, pregnancy

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: High dose MgSO4 Continuous IV drip
Participants in the intervention group received high-dose 50% magnesium sulfate (MgSO₄), consisting of 2 g diluted in 100 mL normal saline (NSS) administered intravenously over 30 minutes, followed by MgSO₄ 6 g diluted with NSS up to a total volume of 350 mL infused intravenously over 3.5 hours (approximately 40-50 mg/kg/h).
Drug: ้High-dose Magnesium sulphate
Participants in the intervention group received high-dose 50% magnesium sulfate (MgSO₄), consisting of 2 g diluted in 100 mL normal saline (NSS) administered intravenously over 30 minutes, followed by MgSO₄ 6 g diluted with NSS up to a total volume of 350 mL infused intravenously over 3.5 hours (approximately 40-50 mg/kg/h).
Drug: standard-dose Magnesium Sulfate
Participants in the control group received standard-dose 50% MgSO₄, consisting of 2 g diluted in 100 mL NSS administered intravenously over 30 minutes, followed by 350 mL NSS infused over 3.5 hours
Active Comparator: standard-dose MgSO4 Continuous IV drip
Participants in the control group received standard-dose 50% MgSO₄, consisting of 2 g diluted in 100 mL NSS administered intravenously over 30 minutes, followed by 350 mL NSS infused over 3.5 hours
Drug: ้High-dose Magnesium sulphate
Participants in the intervention group received high-dose 50% magnesium sulfate (MgSO₄), consisting of 2 g diluted in 100 mL normal saline (NSS) administered intravenously over 30 minutes, followed by MgSO₄ 6 g diluted with NSS up to a total volume of 350 mL infused intravenously over 3.5 hours (approximately 40-50 mg/kg/h).
Drug: standard-dose Magnesium Sulfate
Participants in the control group received standard-dose 50% MgSO₄, consisting of 2 g diluted in 100 mL NSS administered intravenously over 30 minutes, followed by 350 mL NSS infused over 3.5 hours

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Length of ED stay (hours)
Time Frame: through study completion, an average of 1 year
Length of ED stay was defined as the time from administration of the first nebulized treatment to the time of physician-ordered disposition from the emergency department.
through study completion, an average of 1 year

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Hospital admission rate (%)
Time Frame: through study completion, an average of 1 year
Hospital admission rate (%) was defined as admission to an inpatient ward or intensive care unit directly from emergency department following the index visit.
through study completion, an average of 1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Thammasat University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 30, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 24, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 27, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 31, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 31, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 27, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
August 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • MTU-EC-EM-0-176/69
  • Pending (Other Grant/Funding Number: National Institutes of Allery and Infectious Diseases)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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