Metformin added to levodopa/carbidopa for Parkinson's disease

Safety and Efficacy of Metformin in Patients With Parkinson Disaese

PHASE2; PHASE3 · Tanta University · NCT07229651

This will test whether adding metformin to levodopa/carbidopa helps people aged 50 and older with Parkinson's disease.

Quick facts

PhasePHASE2; PHASE3
Study typeInterventional
Enrollment60 (estimated)
Ages50 Years to 70 Years
SexAll
SponsorTanta University (other)
Locations1 site (Tanta)
Trial IDNCT07229651 on ClinicalTrials.gov

What this trial studies

Participants are adults aged 50 and older with confirmed Parkinson's disease who are already taking levodopa/carbidopa. In this interventional Phase 2/3 protocol, metformin is given in addition to standard levodopa/carbidopa therapy to observe effects on motor symptoms and monitor safety. Key exclusions include secondary or atypical parkinsonism, recent stereotaxic surgery, active malignancy, significant cardiovascular or coagulation disorders, pregnancy or lactation, substance addiction, and concurrent anti-inflammatory drug use. Safety assessments and symptom monitoring are conducted through scheduled clinic visits at the trial site.

Who should consider this trial

Good fit: Ideal candidates are adults aged 50 or older with a confirmed diagnosis of Parkinson's disease who are currently treated with levodopa/carbidopa and meet the trial's safety criteria.

Not a fit: Patients with atypical or secondary parkinsonism, active cancer, significant cardiovascular or coagulation disorders, pregnancy or lactation, current use of excluded medications, or substance addiction are unlikely to benefit from this intervention.

Why it matters

Potential benefit: If successful, adding metformin could improve symptom control or slow disease progression for some patients with Parkinson's disease.

How similar studies have performed: Preclinical studies and some observational data suggest metformin may have neuroprotective effects, but randomized clinical evidence in Parkinson's disease is limited.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

Eligible participants were men and women aged 50 years or older with a confirmed diagnosis of PD Patients receiving levodopa/carbidopa therapy.

Exclusion Criteria:

Secondary causes of parkinsonism Patients taking anti-inflammatory drugs Atypical parkinsonian syndromes Prior stereotaxic surgery for Parkinson's disease Pregnancy and lactation Cardiovascular disease patients Patients with coagulation disorders Suffering from active malignancy Addiction to alcohol and / or drugs Known allergy to the studied medications

Where this trial is running

Tanta

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Parkinson Disease

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.