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Mucolytic Agent

N-acetyl Cysteine for Idiopathic Pulmonary Fibrosis (PRECISIONS Trial)

Phase 3
Waitlist Available
Led By Fernando J Martinez, MD
Research Sponsored by Weill Medical College of Cornell University
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
≥ 40 years of age
Diagnosed with IPF according to 2018 ATS/ERS/JRS/ALAT, confirmed by enrolling investigator
Must not have
Active respiratory infection requiring treatment with antibiotics within 4 weeks of Visit 1
Listed for lung transplantation at the time of screening
Timeline
Screening 3 weeks
Treatment Varies
Follow Up 24 months
Awards & highlights
Pivotal Trial

Summary

This trial will compare the effect of NAC plus standard care with placebo plus standard of care in patients with idiopathic pulmonary fibrosis who have the TOLLIP rs3750920 TT genotype. The study will compare the time to a composite endpoint of relative decline in lung function, first respiratory hospitalization, lung transplantation, or all-cause mortality.

Who is the study for?
This trial is for adults over 40 with idiopathic pulmonary fibrosis (IPF) who have a specific genetic marker (TOLLIP rs3750920 TT genotype). They must be on a stable dose of certain IPF medications if used, and able to give informed consent. Pregnant women, those planning pregnancy or not using effective contraception are excluded, as well as individuals with severe illnesses or recent use of investigational drugs.
What is being tested?
The PRECISIONS trial is testing whether N-acetylcysteine (NAC), added to standard care for IPF patients with a particular genotype, can slow down lung function decline compared to placebo. It will also look at hospitalization rates, transplant needs, survival rates, changes in respiratory symptoms and overall health status.
What are the potential side effects?
While the side effects of NAC are not detailed here, common ones may include nausea, vomiting, rash and headache. As it's being tested against a placebo plus standard care in this study; any additional side effects beyond those typically associated with standard IPF treatments would be noted.

Eligibility Criteria

Inclusion Criteria

You may be eligible if you check “Yes” for the criteria below
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I am 40 years old or older.
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I have been diagnosed with IPF by a doctor.
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My genetic test shows I have the TT TOLLIP variant.

Exclusion Criteria

You may be eligible for the trial if you check “No” for criteria below:
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I have not had a respiratory infection treated with antibiotics in the last 4 weeks.
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I am on the lung transplant list.
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I cannot perform a lung function test.
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I have had lung cancer in the past.
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I am a woman able to have children and will use two effective birth control methods during the study.

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~24 months
This trial's timeline: 3 weeks for screening, Varies for treatment, and 24 months for reporting.

Treatment Details

Study Objectives

Study objectives can provide a clearer picture of what you can expect from a treatment.
Primary study objectives
Time to one of the following composite endpoint criteria: 10% relative decline in forced vital capacity (FVC), first respiratory hospitalization, lung transplant or death from any cause.
Secondary study objectives
Time to first respiratory hospitalization
Lung

Side effects data

From 2022 Phase 2 trial • 44 Patients • NCT04005053
36%
Psychiatric
36%
Gastrointestinal
100%
80%
60%
40%
20%
0%
Study treatment Arm
Low-Dose NAC
Placebo
High-Dose NAC

Awards & Highlights

Pivotal Trial
The final step before approval, pivotal trials feature drugs that have already shown basic safety & efficacy.

Trial Design

2Treatment groups
Experimental Treatment
Placebo Group
Group I: N-acetylcysteineExperimental Treatment1 Intervention
600 mg oral N-acetylcysteine (NAC) three times daily for 24 months.
Group II: PlaceboPlacebo Group1 Intervention
Placebo tablet three times daily for 24 months.
Treatment
First Studied
Drug Approval Stage
How many patients have taken this drug
N-acetyl cysteine
2023
Completed Phase 4
~1240

Find a Location

Who is running the clinical trial?

University of WashingtonOTHER
1,815 Previous Clinical Trials
1,912,846 Total Patients Enrolled
7 Trials studying Idiopathic Pulmonary Fibrosis
940 Patients Enrolled for Idiopathic Pulmonary Fibrosis
Weill Medical College of Cornell UniversityLead Sponsor
1,084 Previous Clinical Trials
1,138,682 Total Patients Enrolled
3 Trials studying Idiopathic Pulmonary Fibrosis
2,638 Patients Enrolled for Idiopathic Pulmonary Fibrosis
Pulmonary Fibrosis FoundationOTHER
7 Previous Clinical Trials
12,415 Total Patients Enrolled
4 Trials studying Idiopathic Pulmonary Fibrosis
12,036 Patients Enrolled for Idiopathic Pulmonary Fibrosis

Media Library

N-acetyl cysteine (Mucolytic Agent) Clinical Trial Eligibility Overview. Trial Name: NCT04300920 — Phase 3
Idiopathic Pulmonary Fibrosis Research Study Groups: N-acetylcysteine, Placebo
Idiopathic Pulmonary Fibrosis Clinical Trial 2023: N-acetyl cysteine Highlights & Side Effects. Trial Name: NCT04300920 — Phase 3
N-acetyl cysteine (Mucolytic Agent) 2023 Treatment Timeline for Medical Study. Trial Name: NCT04300920 — Phase 3
Idiopathic Pulmonary Fibrosis Patient Testimony for trial: Trial Name: NCT04300920 — Phase 3
~44 spots leftby Dec 2025