Could a common diabetes drug ease Parkinson's symptoms?

NCT ID NCT05781711

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 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.

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

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.

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: 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

Get updates

Get notified about this study

Sign up to get updates when this study changes or when new studies for Parkinson disease are added.

Our safety recommendation!

By submitting, you agree to our Terms of use

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

More trials for these conditions

Other studies related to the condition(s) this trial covers.