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Showing 1–24 of 30 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Altitude Hypoxia Clear all
Completed Early Phase 1 Interventional Accepts healthy volunteers

Acetazolamide and Exercise Performance at Altitude

NCT03525561
View directory record Official record
Conditions
Hypoxia, Exercise Performance, Cognitive Function, Dexterity
Interventions
Acetazolamide Pill, Placebo pill
Drug
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 45 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 4, 2019 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of Non-steroidal Anti-inflammatory Drugs (NSAIDS) on Acclimatization to High Altitude

NCT02233582
View directory record Official record
Conditions
High Altitude
Interventions
Ibuprofen, Sugar pill
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
2
States / cities
Bishop, California • San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 5, 2021 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of an H1 Receptor Antagonist on Exercise Performance in Hypoxia

NCT03192488
View directory record Official record
Conditions
Hypoxia, Altitude
Interventions
Cetirizine, Placebo oral capsule, Hypoxia
Drug · Other
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 35 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Bloomington, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 15, 2020 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Oxygen Transport in Normobaric vs. Hypobaric Hypoxia

NCT03335917
View directory record Official record
Conditions
Hypoxia, Altitude, Exercise
Interventions
Hypoxia, Exercise
Other
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years to 45 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Sep 7, 2026, 3:18 AM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

Effects of Iloprost on Hypoxic Pulmonary Vasoconstriction at Altitude

NCT00724321
View directory record Official record
Conditions
Hypoxic Pulmonary Vasoconstriction
Interventions
iloprost
Drug
Lead sponsor
Loma Linda University
Other
Eligibility
18 Years to 80 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Sep 17, 2015 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Physiological Adaptations to Simulated Intermittent Altitude on Human Health and Performance

NCT03743610
View directory record Official record
Conditions
Altitude Hypoxia
Interventions
Simulated altitude, Placebo simulated altitude
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Feb 19, 2024 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Melatonin on Sleep, Ventilatory Control and Cognition at Altitude

NCT03588676
View directory record Official record
Conditions
Intermittent Hypoxia
Interventions
Melatonin, Placebo
Other
Lead sponsor
Robert L. Owens
Other
Eligibility
18 Years to 65 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Aug 13, 2019 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Gut-microbiota Targeted Nutritional Intervention for Gut Barrier Integrity at High Altitude

NCT04111263
View directory record Official record
Conditions
Gastrointestinal Injury, Acute Mountain Sickness
Interventions
FP, Placebo, High altitude, Sea level
Dietary Supplement · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years to 39 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 22, 2022 · Synced Sep 7, 2026, 3:18 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Effects of Iloprost on Hypoxic Pulmonary Vasoconstriction and Exercise Capacity at High Altitude

NCT00708565
View directory record Official record
Conditions
Hypoxic Pulmonary Vasoconstriction
Interventions
iloprost
Drug
Lead sponsor
VA Loma Linda Health Care System
Federal
Eligibility
18 Years to 80 Years · Male only
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Jul 1, 2008 · Synced Sep 7, 2026, 3:18 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Ketone Monoester Supplements, High Altitude, and Brain Blood Flow During Exercise

NCT07063732
View directory record Official record
Conditions
High Altitude Hypoxia, Exercise
Interventions
Ketone Monoester (KME), Placebo
Dietary Supplement
Lead sponsor
McMaster University
Other
Eligibility
18 Years to 35 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Bishop, California
Source: ClinicalTrials.gov public record
Updated Jul 13, 2025 · Synced Sep 7, 2026, 3:18 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Pharmacologic Induction of Tolerance for Hypoxia & Hypothermia

NCT06129825
View directory record Official record
Conditions
Hypothermia, Hypoxia, Mountain Sickness
Interventions
Prospective
Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 88 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 11, 2026 · Synced Sep 7, 2026, 3:18 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

The Role of Acetazolamide in Mitigating Inflammation and Innate Immune Activation at High Altitude

NCT07517068
View directory record Official record
Conditions
Hypoxemia, Acute Mountain Sickness (AMS), Inflammation, Immune Response
Interventions
ACETAZOLAMIDE oral capsule, Placebo Arm
Drug · Device
Lead sponsor
University of California, Riverside
Other
Eligibility
18 Years to 65 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Riverside, California
Source: ClinicalTrials.gov public record
Updated Apr 7, 2026 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Randomized, Double-Blind, Placebo-Controlled, Crossover Study of Trans Sodium Crocetinate in Healthy Volunteers Exercising at Altitude

NCT05036980
View directory record Official record
Conditions
Healthy Volunteers With Induced Hypoxia
Interventions
Trans Sodium Crocetinate
Drug
Lead sponsor
Diffusion Pharmaceuticals Inc
Industry
Eligibility
18 Years to 40 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 12, 2022 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Exercise Induced Plasma Volume Expansion Lowers Cardiovascular Strain

NCT05800808
View directory record Official record
Conditions
Cardiac Output, Stroke Volume
Interventions
High Intensity Intervals, Moderate Exercise
Procedure
Lead sponsor
California Baptist University
Other
Eligibility
18 Years to 38 Years · Male only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Riverside, California
Source: ClinicalTrials.gov public record
Updated Apr 5, 2023 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

High Altitude and Exogenous Carbohydrate Oxidation

NCT03851744
View directory record Official record
Conditions
Glucose Metabolism, High Altitude
Interventions
Sea Level, High Altitude
Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 39 Years · Male only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 1, 2021 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Bosentan on Exercise Capacity at High Altitude

NCT00432978
View directory record Official record
Conditions
Altitude, Pulmonary Hypertension
Interventions
Bosentan administration
Drug
Lead sponsor
VA Loma Linda Health Care System
Federal
Eligibility
18 Years to 55 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Apr 17, 2007 · Synced Sep 7, 2026, 3:18 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Intravenous Iron Effects on Performance at High Altitude

NCT06686693
View directory record Official record
Conditions
Hypoxia
Interventions
Injectafer, Placebo
Drug · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 40 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 29, 2025 · Synced Sep 7, 2026, 3:18 AM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

NSAID RCT for Prevention of Altitude Sickness

NCT01606527
View directory record Official record
Conditions
Spectrum of Altitude-associated Neurologic Forms of Altitude
Interventions
Ibuprofen 600mg orally three times daily
Drug
Lead sponsor
Naval Health Research Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Bridgeport, California
Source: ClinicalTrials.gov public record
Updated May 24, 2012 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effect of 10-day Overnight Hypoxia Treatment on Whole Body Insulin Sensitivity (SLEEP HIGH Study)

NCT01872533
View directory record Official record
Conditions
Insulin Resistance
Interventions
Hypoxia Exposure
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
20 Years to 45 Years · Male only
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Dec 1, 2015 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Physiological Effects of Acute and Ramp Simulated Altitude Exposure During Simulated Flight Tasks

NCT05867719
View directory record Official record
Conditions
Altitude Hypoxia
Interventions
Hypoxic breathing conditions
Other
Lead sponsor
University of Texas, El Paso
Other
Eligibility
18 Years to 40 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
El Paso, Texas
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Sep 7, 2026, 3:18 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers

Pharmacological Countermeasures for High Altitude

NCT05300477
View directory record Official record
Conditions
Hypobaric Hypoxia
Interventions
Acetazolamide, Erythropoietin
Drug
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 40 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 25, 2025 · Synced Sep 7, 2026, 3:18 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Effects of Continuous Positive Airway Pressure on Peripheral Oxygen Saturation, Work of Breathing, and Exercise Tolerance at Altitude

NCT05971290
View directory record Official record
Conditions
Hypoxemia, Altitude Hypoxia
Interventions
Continuous positive airway pressure, Ambient air
Device
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 1, 2023 · Synced Sep 7, 2026, 3:18 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Induced Changes in Ventilatory Responsiveness and Altitude Exposure

NCT01241513
View directory record Official record
Conditions
Effects of High Altitude, Hypoxia, Inadequate or Impaired Breathing Pattern or Ventilation, Abnormal Blood Oxygen Pressure
Interventions
NAC, Placebo
Drug
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 39 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 29, 2020 · Synced Sep 7, 2026, 3:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Ketone Esters for Optimization of Operator Performance in Hypoxia

NCT07065864
View directory record Official record
Conditions
Hypoxia
Interventions
Ketone ester, Placebo
Dietary Supplement · Other
Lead sponsor
Florida Institute for Human and Machine Cognition
Other
Eligibility
18 Years and older · Male only
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Pensacola, Florida
Source: ClinicalTrials.gov public record
Updated Jul 14, 2025 · Synced Sep 7, 2026, 3:18 AM EDT