Using metformin to enhance antidepressant treatment in obese patients with depression

Efficacy of Metformin as an Adjunct to Standard Antidepressant Therapy in Treating Depression Among Obese Patients

PHASE4 · Fazaia Ruth Pfau Medical College · NCT06707012

This study is testing if adding metformin to the usual antidepressant treatment can help obese patients with depression feel better.

Quick facts

PhasePHASE4
Study typeInterventional
Enrollment140 (estimated)
Ages18 Years to 45 Years
SexAll
SponsorFazaia Ruth Pfau Medical College (other)
Locations2 sites (Karachi, Sindh and 1 other locations)
Trial IDNCT06707012 on ClinicalTrials.gov

What this trial studies

This clinical trial evaluates the effectiveness of metformin as an additional treatment for improving depressive symptoms in newly diagnosed obese patients already receiving standard antidepressant therapy. Participants will be randomly assigned to either a metformin group or a placebo group, with the primary outcome being the reduction in Hamilton Depression Rating Scale (HAM-D) scores. Secondary outcomes will assess oxidative stress markers through enzymatic activity measurements. The study aims to determine if metformin can significantly enhance the treatment of depression in this specific patient population.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 to 45 with a BMI over 25 and a recent diagnosis of depression.

Not a fit: Patients with existing diabetes or other significant psychiatric disorders may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could lead to improved treatment outcomes for obese patients suffering from depression.

How similar studies have performed: While the combination of metformin and antidepressants is a novel approach, similar studies have shown promise in addressing metabolic issues in depressed patients.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* • Age \>18 to \<45 years

  * Gender: Both genders (Male and Female)
  * BMI \>25
  * Diagnosis: Newly diagnose cases of depression (mild to severe)
  * HBA1C: Less than 5.7% (non-diabetic range)

Exclusion Criteria:

* Existing diabetes

  * Acute illnesses like acute kidney injury, recent history of myocardial infarction, acute liver injury
  * Intellectual disabilities or inability to understand due to any reason
  * Presence of Psychiatric disorders other than depression
  * Chronic kidney disease (eGFR \< 45 mL/min/1.73 m²).
  * Use of any psychotropic medication within the past 6 months.

Where this trial is running

Karachi, Sindh and 1 other locations

Study contacts

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: Depression, oxidative stress, antidepressants, obesity

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.