Could metformin or colchicine ease long COVID? major trial launches
NCT ID NCT07280572
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
The RECLAIM trial is testing whether two inexpensive, widely available drugs—metformin (a diabetes medication) and colchicine (a gout medication)—can improve quality of life for people with long COVID. The study will enroll 1,250 adults in the Netherlands who have had persistent symptoms like fatigue for at least 12 weeks after a COVID infection. Participation is fully remote, with medication delivered to homes and follow-up via online questionnaires over 24 weeks.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- metformin and colchicine
- What this could lead to
- If successful, this could point toward affordable, repurposed treatments to improve physical and mental health for people with long COVID.
- What could go wrong
- This is an early-stage platform trial with open-label design (no placebo for some arms), so results may be biased. The drugs may not work for all long COVID symptoms, and side effects are possible.
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
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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About 1,250 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Feb 2025
- Expected to finish
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Dec 2027
An estimate. End dates often move.
- Lead sponsor
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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
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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 1. Adults aged 18 years or older. 2. Residing in the Netherlands (but excluding the Carribbean parts of the Netherlands) for the duration of trial participation. 3. Persistent PCC symptoms, including fatigue and/or PEM, for a period of at least 12 weeks after the onset of a SARS-CoV-2 infection. The symptoms were not present prior to the infection, but may have partially subsided and resurged after the infection. 4. Self-reported confirmation of having had a SARS-CoV-2 infection by: 1. Positive SARS-CoV-2 nucleic acid amplification test, such as PCR; 2. Positive SARS-CoV-2 rapid diagnostic test, including home-administered tests; 3. COVID-19 diagnosis by a medical specialist (GP or in-hospital), based on the above or other clinical tests and assessments. The above information will not be verified in medical records. 5. Willing and able to provide informed consent. 6. Willing and able to perform trial procedures. 7. Allowing their GP/treating physicians/pharmacy and the RECLAIM trial team to exchange medical information that is relevant for the participant's safety and trial assessments. Exclusion criteria: 1. Having been diagnosed with (exacerbation of) a chronic disease that can account for the onset of the PCC-like symptoms. 2. Being hospitalized or institutionalized at screening. Patients can be rescreened after discharge. 3. Presence of a serious medical condition that would prevent completion of follow-up. 4. Currently enrolled, or having been enrolled within the last 30 days, in any other study where that study's interventions or procedures may affect RECLAIM outcomes or procedures. Individuals can be rescreened after at least 30 days have passed since participation in such a study has been completed. The following exclusion criteria will apply to all potential participants WITHIN ONE TRIAL DOMAIN (these patients may still qualify for another trial domain): 5. The participant cannot be randomized to at least one IP arm and its control arm within a trial domain due to: 1. Known hypersensitivity to an active IP ingredient or IP/placebo excipient; 2. Receiving a treatment that is contraindicated to a trial IP; 3. Already using a trial IP, or a drug in the same drug class as a trial IP, outside of the trial; 4. Any other reason why a trial IP cannot be used, such as (risk of) pregnancy or breastfeeding or renal insufficiency. During screening, these criteria will be assessed by licensed trial physicians. They will question the patient and verify prescription drug and contraceptive use, and other medical exclusion criteria, in each individual patient's medical and/or pharmacy records. The absence of pregnancy in women of childbearing potential has to be confirmed by a negative urine or serum pregnancy test. Additional IP-specific in- and exclusion criteria, if any, are listed in relevant treatment-specific appendices to the core protocol. These also describe the latest information about drug interactions and contraindications as per the IP's SmPC/PIL.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
The full official record for this study. This one lists no contact details, but it is the first place any would appear.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Julius Center for Health Sciences and Primary Care University Medical Center Utrecht, Netherlands
Utrecht, Netherlands
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Nerve block shot could ease Long-COVID brain fog and fatigue?
- Study tracks lingering COVID symptoms in 400 Pre-Surgery patients