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CompletedNCT06333236Updated Sep 22, 2025

Effect of Kron (Citicoline and Nicotinamide Oral Solution) on Patients With Open-angle Glaucoma

An interventional study of Food for Special Medical Purposes: Kron® in Glaucoma, sponsored by ASST Santi Paolo e Carlo. Completed at 2 sites in Italy. Open to participants aged 40 Years to 70 Years. Per ClinicalTrials.gov, last updated 2025-09-22.

Sponsored by ASST Santi Paolo e Carlo · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
30
Allocation
Randomized
Ages
40 Years to 70 Years
Sex
All
01

Study summary

Aim of this study is to investigate the administration effects of the combination of citicoline 40mg/ml and nicotinamide 15mg/ml oral solution (Kron®) on short term improvement in inner retinal function, bioelectrical activity of the visual cortex and visual function.

Read the detailed description

Prospective, masked, randomized placebo-controlled study to evalute the offect of the oral solution Kron® (citicoline 40mg/ml and nicotinamide 15mg/ml) on patients with a diagnosis of open angle glaucoma and risk of glaucoma progression.

Glaucomatous patients with a diagnosis of open angle glaucoma and risk of glaucoma progression who meet the study criteria will be enrolled and randomly assign to the following two arms:

  1. Treatment group (TG): 20 patients will receive Citicoline 40 mg/ml + Nicotinamide 15 mg/ml oral solution for 3 months (10 ml/day)
  2. Control group (CG): 10 patients will be evaluated as control

Once recruited, a clinical evaluator will perform a comprehensive ophthalmologic evaluation at baseline, week 6 and week 12. The following examinations will be done in the following sequence:

  • Visual acuity
  • Slit lamp evaluation
  • PERG
  • PEV pattern
  • Tonometry
  • Visual field
  • Optical Coherence Tomography
  • Dilated Fundus examination
02

Conditions studied

  • Glaucoma

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03

In context

Glaucoma

1,818 studies on the registry are indexed under Glaucoma; 231 are open to participants now.

This study's enrollment of 30 is below the median of 65 across 1,272 interventional studies indexed under Glaucoma.

Browse Glaucoma studies →

Lead sponsor

ASST Santi Paolo e Carlo is the lead sponsor of 5 studies on the registry; 2 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
40 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • glaucomatous patients with moderate visual field loss, MD ranging from -6 dB and -12 dB, and risk of progression
  • controlled intraocular pressure
  • at least 3 previous visual field examinations.

Exclusion criteria

Exclusion Criteria:

  • angle closure glaucoma and secondary open angle glaucoma
  • refractive error outside +2D and -6D
  • ophthalmic surgery 6 months before the recruitment
  • presence of cataract or other conditions that could affect results of perimetry or electroretinography
  • treatment with supplements in any form with a demonstrated or presumed neuroprotecting/neuroenhancing effect in the last six months
  • presence of other ocular or systemic diseases that could affect results of perimetry or electroretinography.
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
30 participants (actual)

Study arms

  • Experimental
    Group KRON

    Active Treatment: Kron® (300ml) oral solution containing citicoline free acid 40 mg/ml; nicotinamide 15 mg/ml. In addition to the IOP-lowering medications, Kron will be administered at a dosage of 10 ml in the morning. To each patient will be given two bottles during the baseline visit and will be asked to return them at the end of the study (3 month) for the compliance assessment.

    Other: Food for Special Medical Purposes: Kron®

  • No intervention
    Control Group

    No interviention in addition to the IOP-lowering medications.

Interventions

  • OtherFood for Special Medical Purposes: Kron®

    Citicoline 40mg/ml + Nicotinamide 15 mg/ml oral solution

06

What researchers measure

Primary outcomes

  1. Electrofunctional evaluation

    Short term improvement in inner retinal function and bioelectrical activity of the visual cortex evaluated by means of PERG (P50 and N95 peaks) and PEV (P100 implicit time and N75-P100 amplitude) pattern.

    Time frame: 3 months

Secondary outcomes

  1. VF and SD-OCT

    Visual field examination will be performed at the beginning and at the end of trial. Standard pattern short-term improvement in visual function in treated patients evaluated by means of VF. Retinal nerve fiber layer thickness, ganglion cell complex thickness and minimum rim width will be evaluated at the baseline and at the end of the study.

    Time frame: 3 months

07

Study locations

2 sites
  • ASST Santi Paolo e Carlo
    Milan, Mi 20142, Italy
  • Luca Rossetti
    Milan, MI 20142, Italy
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 22, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT06333236
Lead sponsor
ASST Santi Paolo e Carlo
Responsible party
Sponsor
First posted
Mar 27, 2024
Start date
Apr 10, 2025
Primary completion
Jul 15, 2025
Completion
Sep 14, 2025
Last update
Sep 22, 2025

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Sep 2025. You cannot join it, but the record below documents what was studied.

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