Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 19 to 69

Oral N-Acetylcysteine for Diabetic Macular Edema

Official title: Effect of Oral N-Acetylcysteine on Diabetic Macular Edema in Type 2 Diabetic Patients With Diabetic Retinopathy

Run by Tanta University · NCT07917338 · Data updated 2026-11-12

This study tests whether taking N-acetylcysteine by mouth can help people with center-involving diabetic macular edema who don’t yet need anti-VEGF therapy.

Quick facts

PhasePhase 2
Study typeInterventional
Ages19 Years to 69 Years
SexAll
Enrollment50 (estimated)
SponsorTanta University
Academic / other
Locations1 site (Damietta)
StatusRecruiting
StartedOctober 28, 2026
Main results expectedOctober 1, 2027
Study endsOctober 1, 2027
Registry record updatedNovember 4, 2026
Trial IDNCT07917338 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults 18-69 with type 2 diabetes and center-involving DME with 20/25 or better vision in the study eye, suitable for observation without immediate anti-VEGF treatment, and clear ocular media for OCT imaging.

Probably not a fit

Patients who require prompt anti-VEGF therapy or have other eye diseases affecting the macula may not benefit from this approach.

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

What this trial studies

This Phase 2 interventional trial evaluates the effect of oral N-acetylcysteine in adults with type 2 diabetes and center-involving diabetic macular edema who are eligible for observation without immediate anti-VEGF treatment. Participants will receive NAC to see if it can reduce retinal swelling and improve vision by addressing oxidative stress and inflammatory pathways linked to diabetic retinal injury. The study focuses on patients aged 18 to 69 with good baseline visual acuity and clear ocular media to allow reliable OCT assessment. Key outcomes likely include changes in macular thickness and visual acuity, alongside safety and tolerability of oral NAC. The trial is conducted at a single center under a lead sponsor from Khadija Ahmed Mhrose Glal and may inform future randomized testing of NAC in DME.

Why it matters

Potential benefit: If successful, participants may experience stabilization or improvement in macular edema and vision due to reduced oxidative stress and inflammation.

How similar studies have gone: Prior research in other retinal conditions has explored antioxidants for retinal protection, but direct evidence for oral NAC in DME is limited and exploratory.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients with type 2 diabetes mellitus
* Adults aged \>18 and \<70 years.
* Patients of either sex.
* Patients with center-involving diabetic macular edema (CI-DME) with best-corrected visual acuity of 20/25 or better in the study eye and who are considered eligible for observation without immediate anti-VEGF treatment according to predefined ophthalmological criteria.
* Clear ocular media allowing good quality OCT macula imaging.

Exclusion Criteria:

* Presence of ophthalmic diseases other than diabetic retinopathy that may affect macular thickness or visual function (Age-related macular degeneration, epiretinal membrane, vitreomacular traction, significant cataract affecting visual assessment, retinal vein occlusion, uveitis, glaucoma, etc.)
* Pregnancy or breastfeeding.
* Current use of systemic antioxidant supplements or antioxidant therapy that could interfere with the study outcomes.
* History of ocular surgery or laser.
* Systemic diseases affecting retinal microvasculature other than diabetes (e.g., uncontrolled hypertension, vasculitis).
* Poor image quality (media opacity, interferes with OCT imaging).

Where it's running

  • Al-Azhar Hospital, Damietta
    Damietta, Egypt
    Recruiting

Study contacts

Similar studies

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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.