ClinicalTrials.gg
TerminatedNCT03331445Updated Jul 16, 2021

Inhaled Gaseous Nitric Oxide (gNO) Antimicrobial Treatment of Difficult Bacterial and Viral Lung (COVID-19) Infections

A Phase 2 interventional study of Nitric Oxide 0.5 % / Nitrogen 99.5 % Gas for Inhalation in Respiratory Tract Infections and Corona Virus Infection, sponsored by Chris Miller. Terminated at 1 site in Canada. Open to participants aged 19 Years and older. Per ClinicalTrials.gov, last updated 2021-07-16.

Primary conditionCOVID-19Registry: Respiratory Tract InfectionsReclassifiedWhy we changed it
Registry
Respiratory Tract Infections — the first condition term the registry derived for this study.
ClinicalTrials.gg
COVID-19
Why
  1. The study's title name COVID-19, a narrower term within Respiratory Tract Infections.
Confidence
High: the new condition is named in the study's own title. Of 46 hand-checked studies reclassified this way, 72% were exactly right and 89% in the right disease family; the registry's first term was right for 4% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Chris Miller · Phase 2, Interventional, and Treatment

Why this study was terminated
Covid Incidence too low and Funding Completed
Phase
Phase 2
Study type
Interventional
Enrollment
13
Allocation
Not applicable
Ages
19 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 11 studies testing Nitric Oxide in COVID-19 — none open to participants now, none under way, none of them phase 3. Nitric Oxide · COVID-19.

Enrollment
8th of 11
13 · median 47
Started
2017
the only one that year
Phase 2
7 of 11
none open now
Registered
1st of 11
by date
Lead sponsor
1 of 11
Chris Miller

Among the 11 studies testing Nitric Oxide in COVID-19, this one is the 8th largest by enrollment, is the only one that started in 2017, is one of 7 in phase 2, and was the 1st registered.

COVID-19

7,990 studies on the registry are indexed under COVID-19; 466 are open to participants now.

Browse COVID-19 studies →

Open to participants now

None of the 11 studies testing Nitric Oxide in COVID-19 is open now. The open studies under COVID-19, anywhere →

About Nitric Oxide

Nitric Oxide: first FDA approval 1999 (INOMAX), first EMA approval 2001. What it is approved for, and how studies give it, is on its page →

Who these studies take

Of the 356 COVID-19 studies recruiting now, 207 (58%) set no upper age limit and 83 (23%) stop at 75 or younger; 91 take children under 18; 136 take healthy volunteers.

This study: 19 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Download CSVNarrow it in search →With an account: the 11 studies testing Nitric Oxide in COVID-19 as a file.
02

Study summary

Non tuberculous mycobacteria (NTM), Burkholdria spp, Aspergillus in the lung are almost impossible to eradicate with conventional antibiotics. In addition COVID-19 has know current treatment. These patients have few options to treat their lung infection. Nitric oxide has broad bactericidal and virucidal properties. It has been shown that nitric oxide was safe to be inhaled for similar cystic fibrosis patients and reduced drug resistant bacteria in the lungs. Further, research indicates that clinical isolates of NTM, Burkholderia spp, Aspergillus spp and Corona-like viruses can be eradicated by 160ppm NO exposure in the laboratory petri dish. This is not the first time inhaled NO treatment has been used in patients with difficult lung infections. This study will provide more data to see if NO therapy can reduce the bacterial load in the lungs, help the patients breath better; and in the case of COVID-19 act as a anti-viral agent resulting in the reduction of incidence of oxygen therapy, mechanical assistance of BIPAP, CPAP, intubation and mechanical ventilation during the study period.

Read the detailed description

Main Study

Primary Objective: Assess the safety of inhaled NO (gNO) in adults \& adolescents with NTM, Burkholderia, Aspergillus Lung Infections and Viral Lung (COVID-19) Infections

Safety will be evaluated by unanticipated adverse events in clinical labs (hematology, coagulation, and serum chemistries); in vitals; in inspired concentration of NO, O2 and NO2 delivered to each subject and; in real time methemoglobin and oxygen saturation levels.

Primary Endpoint:

Determine the safety of gNO in the NTM population,

  • as confirmed by no unanticipated adverse events
  • Absence of a deleterious mean change in FEV1% predicted (absolute) from baseline

Secondary safety Endpoint: Determine the efficacy of inhaled NO in adults with NTM, Burkholderia and Aspergillus Lung Infections

Efficacy will be evaluated by measuring the change in lung function with spirometry (specifically absolute change in FEV1 % predicted) from baseline to Days 5, 12, 19 and 26.

Secondary Efficacy Endpoint Determine the presence of an efficacy signal of gNO in the NTM, Burkholderia and Aspergillus Lung Infections

Efficacy will be assessed by the antimicrobial effect of inhaled NO on the density of NTM species and other microorganisms in sputum. Serial measurements of these microbial colony counts in sputum have been previously used as a measure of antimicrobial activity in other clinical trials of antibiotics in NTM.

  • as confirmed by an improvement in pre-treatment bacterial colonization and post-treatment bacterial colonization on Days 19 and 26 as compared to baseline.

Efficacy will be assessed by change in Quality of Life Score.

  • as assessed by an improvement in CRISS Score on Day 5, 19 and 26 as compared to baseline measurement;
  • as determined by improvement in six-minute walk test with one minute recovery as compared to baseline measurement.

COVID-19 Substudy

Primary Endpoint:

Efficacy will be evaluated by measuring reduction in the incidence of mechanical assistance of BIPAP, CPAP, intubation and mechanical ventilation during the study period.

Secondary Endpoints:

  1. Proportion of patients with mild COVID2019 who deteriorate to a severe form of the disease requiring mechanical intervention like BIPAP/CPAP, intubation and mechanical ventilation;
  2. Mortality from all causes during the study period;
  3. Negative conversion of COVID-19 RT-PCR from upper respiratory tract measured as the proportion of patients with a negative conversion of RT-PCR from an oropharyngeal or a nasopahryngeal swab;
  4. Time to clinical recovery defined as the time from initiation of the study to discharge or to normalization of fever (defined as \<36.6°C from axillary site, or \< 37.2°C from oral site or \< 37.8°C from rectal or tympanic site), respiratory rate (\< 24 bpm while breathing room air);
  5. Alleviation of symptoms recorded in the Modified Jackson Cols score with particular definition of cough (defined as mild or absent in a patient reported scale of severity).
03

Conditions studied

  • Respiratory Tract Infections
  • Corona Virus Infection

Browse trials for

Keywords

  • inhaled nitric oxide
  • non tuberculous mycobacteria
  • drug resistant pneumonia
  • Burkholderia
  • Aspergillus
  • COVID-19
  • Viral Envelope Proteins
  • SARS-COV-2
04

In context

COVID-19 Reclassified

7,990 studies on the registry are indexed under COVID-19; 466 are open to participants now.

This study's enrollment of 13 is below the median of 102 across 4,364 interventional studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

This is the only study on the registry with Chris Miller as lead sponsor.

Compared within COVID-19, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Respiratory Tract Infections. The counts are of registry records indexed under each term, refreshed daily. How we classify →

05

Who can participate

Ages eligible
19 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

COVID SubStudy Inclusion Criteria

  • Capable of understanding and providing signed and ability to adhere to the requirements and restrictions of this protocol;
  • Men and Women ≥ 19 years of age unless local laws dictate otherwise;
  • English speaking;
  • Suspected of exposure to SARS-CoV-2 with fatigue and at least a fever (>37.90 C) or cough or sore throat or a positive swab for SAR-CoV-2 within 5 days of the of enrollment;
  • Must be willing to use an adequate form of (or abstinence) from the time of the first dose with the IMP until after the last dose of IMP.

Exclusion Criteria

  • Prior Tracheostomy;
  • Concomitant treatment involving high flow nasal cannula;
  • Any clinical , as judged by the attending physician;
  • Mentally or neurologically disabled patients who are considered not fit to consent to their participation in the study;
  • Prior COVID-19 infection or a positive swab for SARS-CoV-2 greater than 5 days from enrollment;
  • Family members in the same household already on the study;
  • Hydroxychloroquine, colchicine and other experimental antiviral medications;
  • unwilling to practice a medically acceptable form of contraception from screening to Day 26 (acceptable forms of contraception: abstinence, hormonal birth control, intrauterine device, or barrier method plus a spermicidal agent).

Recruitment on hold for following Criteria during COVID-19 Pandemic

Inclusion Criteria:

  • Written informed consent.
  • Has been previously diagnosed with NTM, Burkholderia spp and Aspergillus spp. or Corona-like viral infection:

    1. NTM, Burkholderia spp and Aspergillus spp defined as positive culture(s) of at least one species of Mycobacterium avium Complex (MAC) or Mycobacterium abscessus Complex (MABSCor Burkholderia spp and Aspergillus spp) or Corona-like viral infection:
    2. History of repeatedly positive cultures (2 or more), irregardless of therapy
  • Male or female ≥14 years of age.
  • Female not pregnant at time of study.
  • Has an ≥ 30 % of predicted. c. Suspected corona-like viral infection
  • Oxygen saturation on room air >92% at screening.

    a. Able to breathe without supplemental oxygen for 60 minutes

  • Non-smoker for at least 6 months prior to screening and agrees not to smoke during the study.
  • Willing and able to comply with the treatment schedule and procedures.

Exclusion Criteria:

  • Use of an drug within 30 days of screening
  • History of frequent epistaxis (>1 episode/month)
  • Significant hemoptysis within 30 days (≥ 5 mL of blood in one coughing episode or > 30 mL of blood in a 24 hour period)
  • History of reactive pulmonary vascular hypertension
  • Methemoglobin >3% at screening
  • Liver function insufficiency (/ AST >3 of normal values)
  • \<11 g/dl
  • Thrombocytopenia ( count \<100,000/mm3) at screening
  • international ratio (INR) > 1.3 at screening
  • Changes to antibiotics (e.g. azithromycin) from 7 days prior to screening through last treatment day. (Subjects may be taking antibiotics or antivirals during this time period, but they cannot start, stop or change doses during this time period)
  • On supplemental oxygen during gNO treatment (SaO2 \< 90% for 50 minutes while resting in a chair).
  • For women of child bearing potential:

    1. positive pregnancy test at screening or
    2. lactating or
    3. unwilling to practice a medically acceptable form of contraception from screening to Day 36 (acceptable forms of contraception: abstinence, hormonal birth control, intrauterine device, or barrier method plus a spermicidal agent)
  • Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the patient or the quality of the data.
Terms in these criteria, in plain language(9)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

FEV1

From a breathing test (spirometry): how much air you can blow out in the first second. Often given as a percentage of what is expected for your age, height and sex.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

INR, PT and aPTT (clotting tests)

Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.

Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.

06

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
13 participants (actual)

Study arms

  • Experimental
    160 ppm Nitric Oxide

    Drug: Nitric Oxide 0.5 % / Nitrogen 99.5 % Gas for Inhalation

Interventions

  • DrugNitric Oxide 0.5 % / Nitrogen 99.5 % Gas for Inhalation

    Drug page: Nitric Oxide

    Inhaled Nitric Oxide 160ppm balance air

    Also known as: Thiolanox

07

What researchers measure

Primary outcomes

  1. Measure the safety of 160ppm inhaled nitric oxide delivery in NTM subjects

    Measure the number of unanticipated adverse events over the duration of the study protocol

    Time frame: 26 Days

Secondary outcomes

  1. Measure the effect of 160ppm inhaled nitric oxide delivery on lung spirometry in NTM subjects

    Measure the change in absolute FEV1.0 change from baseline during 160 ppm inhalation therapy

    Time frame: Day 5,12,19 and 26

  2. Measure the antimicrobial effect of 160ppm inhaled nitric oxide on lung NTM bacterial load in the sputum

    Measure the difference from baseline NTM species bacterial load (0 to +4) in sputum during 160ppm nitric oxide inhalation therapy

    Time frame: Day 19 and 26

  3. Measure the effect of 160ppm inhaled nitric oxide on Quality of Life (CRISS) Score

    Measure the difference from baseline CRISS (0-100) during 160ppm nitric oxide inhalation therapy (lower score represents higher quality of life)

    Time frame: Day 19 and 26

Other outcomes

  1. Sub-Study Primary Endpoint(s): Efficacy to reduce respiratory interventions

    Measuring reduction in the incidence of mechanical assistance including oxygen therapy, BIPAP, CPAP, intubation and mechanical ventilation during the study period.

    Time frame: Day 26

  2. Efficacy in reduction of mortality

    Measured by death from all causes

    Time frame: Day 26

  3. Antiviral effect

    Assessed by time to negative conversion of COVID-19 RT-PCR from upper respiratory tract

    Time frame: Day 26

  4. Efficacy on clinical improvement

    Time to clinical recovery as measured by resolution of clinical signs

    Time frame: Day 26

  5. Efficacy on the respiratory symptoms

    Measured by change in the Modified Jackson Cold Score

    Time frame: Day 26

08

Study locations

1 site
  • Nitric Solutions-Mobile Unit
    Vancouver, British Columbia V7H2Y4, Canada
09

References and documents

Publications

  • Deppisch C, Herrmann G, Graepler-Mainka U, Wirtz H, Heyder S, Engel C, Marschal M, Miller CC, Riethmuller J. Gaseous nitric oxide to treat antibiotic resistant bacterial and fungal lung infections in patients with cystic fibrosis: a phase I clinical study. Infection. 2016 Aug;44(4):513-20. doi: 10.1007/s15010-016-0879-x. Epub 2016 Feb 9. PubMed 26861246 ↗
  • Miller C, Miller M, McMullin B, Regev G, Serghides L, Kain K, Road J, Av-Gay Y. A phase I clinical study of inhaled nitric oxide in healthy adults. J Cyst Fibros. 2012 Jul;11(4):324-31. doi: 10.1016/j.jcf.2012.01.003. Epub 2012 Apr 18. PubMed 22520076 ↗
  • Yaacoby-Bianu K, Gur M, Toukan Y, Nir V, Hakim F, Geffen Y, Bentur L. Compassionate Nitric Oxide Adjuvant Treatment of Persistent Mycobacterium Infection in Cystic Fibrosis Patients. Pediatr Infect Dis J. 2018 Apr;37(4):336-338. doi: 10.1097/INF.0000000000001780. PubMed 28885458 ↗

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Oct 2017 to primary completion in Jun 2021, 44 months.

How these figures are worked out, and which studies are left out of them.

Registered
Oct 25, 2017
First posted
Nov 6, 2017
StartActual
Oct 24, 2017
Primary completionActual
Jun 30, 2021
CompletionActual
Jun 30, 2021
Last update
Jul 16, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jul 16, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03331445
Lead sponsor
Chris Miller
Collaborators
Mallinckrodt
Responsible party
Chris Miller (CSO, Nitric Solutions Inc.) — Sponsor-investigator
First posted
Nov 6, 2017
Start date
Oct 24, 2017
Primary completion
Jun 30, 2021
Completion
Jun 30, 2021
Last update
Jul 16, 2021

Study contacts

Jeremy D Road, MD
principal investigator · MD

Oversight

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

Not currently enrolling

This study is terminated, as verified in Jul 2021. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Nitric Oxide

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