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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 Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Pioglitazone on Exogenous Carbohydrate Oxidation During Steady-State Exercise at High Altitude

NCT06164665
View directory record Official record
Conditions
High Altitude
Interventions
Pioglitazone 15mg, Placebo
Drug · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 39 Years · Male only
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Sep 9, 2026, 2:13 AM 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 Sep 9, 2026, 2:13 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 9, 2026, 2:13 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 9, 2026, 2:13 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 9, 2026, 2:13 AM 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 Sep 9, 2026, 2:13 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Three New Ideas to Protect Special Forces From the Stress of High Altitude

NCT02463357
View directory record Official record
Conditions
Mountain Sickness
Interventions
Quercetin, Nifedipine extended release, Methazolamide, Metformin, Placebo, Nitrite
Dietary Supplement · Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
148 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Alma, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 29, 2021 · Synced Sep 9, 2026, 2:13 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 9, 2026, 2:13 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 9, 2026, 2:13 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 9, 2026, 2:13 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Acetazolamide on Subclinical High-Altitude Pulmonary Edema Detected by Lung Ultrasonography

NCT03490916
View directory record Official record
Conditions
High Altitude Pulmonary Edema
Interventions
Acetazolamide, Placebo
Drug
Lead sponsor
Vincent Kan
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 9, 2019 · Synced Sep 9, 2026, 2:13 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Effects of High Altitude on AMPK Activation

NCT02391519
View directory record Official record
Conditions
Pregnancy, IUGR, Preeclampsia
Interventions
Collection of myometrial, cord blood, and placental tissue samples
Procedure
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Sep 9, 2026, 2:13 AM 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 Sep 9, 2026, 2:13 AM 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 Sep 9, 2026, 2:13 AM EDT
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 Sep 9, 2026, 2:13 AM 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 Sep 9, 2026, 2:13 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Efficacy of Prophylactic Treatment of Oral Prochlorperazine for Acute Mountain Sickness

NCT06310642
View directory record Official record
Conditions
AMS, Acute Mountain Sickness
Interventions
Immediate descent from altitude., Diphenhydramine, Prochlorperazine 10 mg
Other · Drug
Lead sponsor
CHRISTUS Health
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Corpus Christi, Texas
Source: ClinicalTrials.gov public record
Updated May 27, 2024 · Synced Sep 9, 2026, 2:13 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 9, 2026, 2:13 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Substrate Utilization, Exercise Performance, and Skeletal Muscle Response to Energy Deficit and Altitude Acclimatization

NCT02731066
View directory record Official record
Conditions
Weight Loss, Other Effects of High Altitude
Interventions
Standard pro, High pro, carbo bev, placebo bev
Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 42 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 5, 2017 · Synced Sep 9, 2026, 2:13 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 9, 2026, 2:13 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 9, 2026, 2:13 AM 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 Sep 9, 2026, 2:13 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 9, 2026, 2:13 AM 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 Sep 9, 2026, 2:13 AM EDT