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A 24-Month Trial of NPI-001 for the Preservation of Photoreceptors in Retinitis Pigmentosa Associated With Usher Syndrome

NCT07710196 · Status: NOT_YET_RECRUITING · Phase: PHASE3 · Type: INTERVENTIONAL · Enrollment: 80

Last updated 2026-07-17

No results posted yet for this study

Summary

The goal of this clinical trial is to learn if NPI-001 works to prevent progression of retinitis pigmentosa in adults diagnosed with Usher syndrome. It will also provide information about the safety of NPI-001. The main questions it aims to answer are:

Does NPI-001 slow down the loss of photoreceptors? What medical problems do participants have when taking NPI-001? Researchers will compare NPI-001 to a placebo (a look-alike substance that contains no drug) to see if NPI-001 works to preserve vision.

Participants will:

Take NPI-001 or a placebo twice a day, every day for 24 months and visit the clinic 9 times for checkups and tests.

Conditions

  • Retinitis Pigmentosa (RP)
  • Usher Syndrome

Interventions

DRUG

Placebo

Oral placebo tablet

DRUG

NPI-001

Oral n-acetyl cysteine amide tablet

Sponsors & Collaborators

  • Foundation Fighting Blindness

    collaborator OTHER

  • Nacuity Pharmaceuticals, Inc.

    lead INDUSTRY

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-08-31
Primary Completion
2029-02-28
Completion
2029-02-28
FDA Drug
Yes

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07710196 on ClinicalTrials.gov