Clinical trial Recruiting at 2 sites Phase 2 Interventional Ages 40 to 69

Levosulpiride treatment for diabetic eye conditions

Official title: Clinical Trial to Evaluate the Safety and Efficacy of Levosulpiride to Improve Retinal Alterations in Patients With Diabetic Retinopathy and Diabetic Macular Edema.

Run by Universidad Nacional Autonoma de Mexico · NCT03161652 · Data updated 2026-11-12

This study is testing if a medication called levosulpiride can help improve eye problems caused by diabetes in people aged 40 to 69.

Quick facts

PhasePhase 2
Study typeInterventional
Ages40 Years to 69 Years
SexAll
Enrollment120 (estimated)
SponsorUniversidad Nacional Autonoma de Mexico
Academic / other
Locations2 sites (Querétaro City, Querétaro and 1 other locations)
StatusRecruiting
StartedMay 24, 2017
Main results expectedDecember 2026
Study endsJune 2027
Registry record updatedNovember 18, 2025
Trial IDNCT03161652 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 40 to 69 with mild to moderate diabetic macular edema or non-proliferative diabetic retinopathy who meet specific health criteria.

Probably not a fit

Patients with severe ocular complications, recent ocular treatments, or contraindications for levosulpiride will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial evaluates the safety and efficacy of levosulpiride, a dopamine D2 receptor blocker, in improving retinal alterations caused by diabetic macular edema (DME) and diabetic retinopathy (DR). It is a randomized, double-blind, placebo-controlled study involving patients aged 40 to 69 with mild to moderate DME and non-proliferative DR. The trial aims to assess the impact of levosulpiride on retinal health by measuring ophthalmologic and health parameters before and after treatment. The study also considers the role of prolactin levels in the treatment of these conditions.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients suffering from diabetic retinopathy and diabetic macular edema, potentially improving their vision and quality of life.

How similar studies have gone: While the approach of using levosulpiride is novel, preclinical studies suggest a protective role for prolactin, indicating potential for success in this area.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age equal or greater than 40 years but no older than 69 years
* Male and female subjects with mild and moderate diabetic macular edema (DME), non-proliferative diabetic retinopathy (DR), and with proliferative DR undergoing medically prescribed vitrectomy.
* Signing informed consent
* Without ocular complications: severe myopia (\> 6 diopters), ocular media opacity, retinal detachment, etc.
* Without previous ocular treatments: ocular surgeries, retinal laser photocoagulation, intravitreal administration of antiangiogenic agents (delivered \< 6 months before enrollment).
* Prolactin serum levels ≤ 20 ng/ml
* With normal or mild loss of kidney function (glomerular filtration rate \>60 ml/min) for groups with DME and DR without vitrectomy.
* With mild to severe loss of kidney function (glomerular filtration rate \>30 ml/min) for groups with DR undergoing vitrectomy.
* Without contraindications for the use of levosulpiride (Parkinson disease, epilepsy, breast cancer, alcoholism, hypokalemia).
* Without hyperprolactinemia inducing conditions: Pathologies (hypothyrodism, hepatic dysfunction, prolactinomas); Medication (antipsychotics, antidepressants, prokinetics, other)

Exclusion Criteria:

* Not meeting inclusion criteria.
* Adverse and intolerable drug effects.
* Not complying with study medication
* Inability to continue in-hospital appointments.
* Missing outcome data
* Hesitation to continue with study medication
* Relocation to another state or country
* Voluntary withdrawal of consent

Where it's running

  • Instituto Mexicano de Oftalmologia (IMO)
    Querétaro City, Querétaro, Mexico
    Recruiting
  • Instituto de la Retina del Bajio SC (INDEREB)
    Querétaro City, Querétaro, Mexico
    Recruiting

Study contacts

  • Principal investigator: Ludivina Robles Osorio, M.D., Ph.D. — Universidad Autónoma de Querétaro
  • Study coordinator: Carmen Clapp, Ph.D.
  • Email: clapp@unam.mx
  • Phone: 52442 2381028

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.