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Showing 1–24 of 42 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Altitude Sickness Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Decompression Tables for Diving at Altitude

NCT03390335
View directory record Official record
Conditions
Decompression Sickness, Acute Mountain Sickness
Interventions
Pressure, Breathing Gas
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years to 40 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 13, 2021 · Synced Jul 22, 2026, 2:05 PM 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 Jul 22, 2026, 2:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety Evaluation of Aminophylline and Methazolamide

NCT01587027
View directory record Official record
Conditions
Mountain Sickness
Interventions
Aminophylline, Methazolamide, Aminophylline and Methazolamide
Drug
Lead sponsor
Poudre Valley Health System
Other
Eligibility
18 Years to 40 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Loveland, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 9, 2017 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Safety and Efficacy of T89 in the Prevention and Treatment of Adults With Acute Mountain Sickness (AMS)

NCT04993729
View directory record Official record
Conditions
Acute Mountain Sickness (AMS)
Interventions
T89 capsule, Placebo capsule
Drug
Lead sponsor
Tasly Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
853 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Aug 12, 2024 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

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

NCT03368352
View directory record Official record
Conditions
Altitude Hypoxia, Ventilation, Sleep, Oxidative Stress, Neurocognitive Dysfunction
Interventions
Melatonin, Hypoxia
Dietary Supplement · Other
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 30, 2019 · Synced Jul 22, 2026, 2:05 PM 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 Jul 22, 2026, 2:05 PM 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 Jul 22, 2026, 2:05 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Altitude Sickness Prevention and Efficacy of Comparative Treatments

NCT02604173
View directory record Official record
Conditions
Acute Mountain Sickness
Interventions
Budesonide, Acetazolamide, Placebo
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 65 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Bishop, California
Source: ClinicalTrials.gov public record
Updated Dec 11, 2018 · Synced Jul 22, 2026, 2:05 PM 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 Jul 22, 2026, 2:05 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Colorado-Oregon Altitude Study

NCT05734716
View directory record Official record
Conditions
Acute Mountain Sickness
Interventions
Erythropoietin, Iron sucrose (Venofer), Sterile Sodium Chloride
Drug
Lead sponsor
University of Oregon
Other
Eligibility
18 Years to 40 Years
Enrollment
121 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
2
States / cities
Leadville, Colorado • Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 9, 2023 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Overnight Low Oxygen Exposure on Energy Balance

NCT04151927
View directory record Official record
Conditions
Resting Metabolic Rate, Appetite, Heart Rate Variability
Interventions
Normobaric Hypoxia, Normobaric Normoxia
Device
Lead sponsor
Florida State University
Other
Eligibility
20 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Nov 28, 2021 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

NASA Prebreathe Study

NCT06740305
View directory record Official record
Conditions
Decompression Sickness
Interventions
Altitude, 100% Oxygen
Other · Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 50 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 31, 2026 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating the Utility of Continuous Positive Airway Pressure in the Treatment of High Altitude Pulmonary Edema

NCT04186598
View directory record Official record
Conditions
Continuous Positive Airway Pressure, High Altitude Pulmonary Edema
Interventions
CPAP mask system, Nifedipine 30 MG, CPAP mask system without PEEP
Device · Drug
Lead sponsor
CommonSpirit Health
Other
Eligibility
18 Years and older
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Breckenridge, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 6, 2024 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

High Altitude Muscle Recovery

NCT06392373
View directory record Official record
Conditions
High Altitude
Interventions
CHO+PRO, CHO
Dietary Supplement
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 39 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 19, 2025 · Synced Jul 22, 2026, 2:05 PM 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 Jul 22, 2026, 2:05 PM 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 Jul 22, 2026, 2:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Sickness Evaluation at Altitude With Acetazolamide at Relative Doses

NCT03828474
View directory record Official record
Conditions
Acute Mountain Sickness
Interventions
Acetazolamide Pill
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 75 Years
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Bishop, California
Source: ClinicalTrials.gov public record
Updated Oct 21, 2019 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Efficacy Study of Riociguat and Its Effects on Exercise Performance and Pulmonary Artery Pressure at High Altitude

NCT02024386
View directory record Official record
Conditions
Hypertension, Pulmonary, Altitude Sickness
Interventions
Riociguat
Drug
Lead sponsor
Richard Moon
Other
Eligibility
18 Years to 40 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 11, 2017 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Safety and Efficacy of T89 in Prevention and Treatment of Adults With Acute Mountain Sickness (AMS)

NCT03552263
View directory record Official record
Conditions
Acute Mountain Sickness (AMS)
Interventions
T89 capsule, Placebo capsule
Drug
Lead sponsor
Tasly Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
132 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Nov 12, 2019 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Mild Hypobaric Hypoxia on Sleep and Post-sleep Performance

NCT00498563
View directory record Official record
Conditions
Altitude, Hypoxia, Environmental Sleep Disorder
Interventions
altitude exposure in hypobaric chamber
Procedure
Lead sponsor
Oklahoma State University Center for Health Sciences
Other
Eligibility
30 Years to 60 Years · Male only
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Tulsa, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 23, 2015 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Altitude Sickness Prevention With Ibuprofen Relative to Acetazolamide and Treatment Efficacy

NCT03154645
View directory record Official record
Conditions
Acute Mountain Sickness
Interventions
Ibuprofen, Acetazolamide
Drug
Lead sponsor
Grant S Lipman
Other
Eligibility
18 Years to 65 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Bishop, California
Source: ClinicalTrials.gov public record
Updated Nov 25, 2018 · Synced Jul 22, 2026, 2:05 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Prochlorperazine Maleate Versus Placebo for the Prophylaxis of Acute Mountain Sickness

NCT06450899
View directory record Official record
Conditions
Acute Mountain Sickness
Interventions
Prochlorperazine Maleate, Placebo
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 75 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Evergreen, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jul 22, 2026, 2:05 PM 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 Jul 22, 2026, 2:05 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Sickness Evaluation at Altitude With Acetazolamide at Relative Dosages

NCT03424226
View directory record Official record
Conditions
Acute Mountain Sickness
Interventions
Acetazolamide
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 75 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Nov 19, 2018 · Synced Jul 22, 2026, 2:05 PM EDT