Parkinson's drug shows promise for diabetic eye disease
NCT ID NCT07444892
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested whether levodopa, a drug used for Parkinson's disease, can help people with diabetes who have early signs of eye damage (diabetic retinopathy). The goal was to find the best dose and understand how it works to improve the retina's electrical signals. 230 adults with diabetes took part, and researchers measured eye function using special tests.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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230 people
The number who actually took part.
- Started
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Apr 2022
- Finished
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Nov 2025
- 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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Accepted
You do not need to have the condition being studied to take part.
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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: * Adults * diagnosed with diabetes mellitus Exclusion Criteria: * taking dopamine effecting drugs * have a pituitary tumor * psychosis, Parkinson's disease * cognitive deficits * confounding ocular disease Control Participants: Non-diabetic participants with no visual problems to create control measurements.
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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
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Atlanta VA Medical Center
Decatur, Georgia, 30033, United States
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Other studies related to the condition(s) this trial covers.
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