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Blood drug levels may explain why some asthma patients Don't respond to mepolizumab

NCT ID NCT05495932

Knowledge-focused Sponsor: University Hospital, Montpellier Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study measured the amount of mepolizumab in the blood of 50 adults with severe asthma who were already taking the drug. Researchers compared drug levels between those who responded well to treatment and those who did not. The goal was to see if differences in how the body processes the drug could explain why some patients don't get better. This was an observational study, not a test of a new treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

50 people

The number who actually took part.

Started

Nov 2022

Finished

Dec 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Minimum age: 18 years old * History of severe asthma diagnosed by a physician (according to Global Initiative for Asthma (GINA) criteria) * Subject on a combination of high-dose (ICS equivalent to 1000 μg beclomethasone) and medium dose inhaled corticosteroid and long acting beta-agonists at least 12 months before inclusion * Treatment with mepolizumab in line with the Marketing Authorization * Having received at least 6 doses of mepolizumab (monthly subcutaneous administration) * Documented initial clinical response to mepolizumab Exclusion Criteria: * Other respiratory diseases * Potential interference from another study * Immunosuppressive treatment (i.e methotrexate, polyvalent immunoglobulins, other monoclonal antibody for other condition such as cancer; oral and/or inhaled corticosteroids are allowed) * Populations protected according to the French public health code * Patient is unavailable, unable or unwilling to attend future visits * Non-beneficiary of the French national health insurance system * Lack of informed consent

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Conditions

The condition(s) this trial relates to.

asthma chronic asthma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Asthma

Contacts and locations

Locations

  • University Hospital of Tours

    Tours, France, 37044, France

  • university Hospital of Montpellier

    Montpellier, France, 34295, France

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