Could a common diabetes drug ease Parkinson's symptoms?
NCT ID NCT05781711
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This phase 2 trial tested whether metformin, a widely used diabetes medication, could improve symptoms in people with Parkinson's disease. Sixty participants who were already taking levodopa received either metformin or a placebo. Researchers measured changes in movement and daily function using a standard rating scale, and also looked at blood markers like brain-derived neurotrophic factor.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- metformin
- What this could lead to
- If it works, metformin could become an add-on treatment to help control Parkinson's symptoms better.
- What could go wrong
- This is a small, early-phase trial with only 60 participants. Metformin is not a cure and may not show significant benefit over standard care.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
-
60 people
The number who actually took part.
- Started
-
Jan 2023
- Finished
-
Jan 2025
- 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 to 75 years
- Sex
-
Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Age ≥ 18 years Both males and females will be included Negative pregnancy test and effective contraception. Diagnosed Parkinson's disease patient taking Levodopa Exclusion Criteria: Secondary causes of Parkinsonism Diabetic patients Patients taking anti-inflammatory drugs Atypical parkinsonian syndromes Prior stereotaxic surgery for Parkinson's disease Pregnancy and lactation Suffering from active malignancy Addiction to alcohol and/or drugs Known allergy to the studied medications
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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.
Contacts and locations
Locations
-
Faculty of Medicine, Menoufia University
Tanta, Shebeen El-Kom, 32511, Egypt
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Other studies related to the condition(s) this trial covers.
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