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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Altitude Clear all
Completed Phase 1 Interventional Accepts healthy volunteers Results available

The Safety Evaluation of Aminophylline and Ambrisentan When Administered Orally Alone and in Combination to Healthy Volunteers

NCT01530464
View directory record Official record
Conditions
High Altitude Pulmonary Hypertension
Interventions
Aminophylline, Ambrisentan, Aminophylline plus ambrisentan
Drug
Lead sponsor
Thies Schroeder
Other
Eligibility
18 Years to 40 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 15, 2014 · Synced Jul 22, 2026, 11:09 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, 11:09 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Rapid Acclimatization to Hypoxia at Altitude

NCT01702025
View directory record Official record
Conditions
Physiological Function in Low Oxygen Environment
Interventions
Placebo, Aminophylline, Methazolamide, Aminophylline+Methazolamide
Drug
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 40 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Oct 23, 2014 · Synced Jul 22, 2026, 11:09 PM EDT
Active, not recruiting Phase 2 Interventional

RGX-314 Gene Therapy Administered in the Suprachoroidal Space for Participants With Diabetic Retinopathy (DR) With and Without Center Involved-Diabetic Macular Edema (CI-DME)

NCT04567550
View directory record Official record
Conditions
Diabetic Retinopathy (DR), Center-Involved Diabetic Macular Edema (CI-DME)
Interventions
ABBV-RGX-314 Dose 1, ABBV-RGX-314 Dose 2, ABBV-RGX-314 Dose 3, Topical Steroid, ABBV-RGX-314 Dose 4, Aflibercept
Genetic · Drug · Biological
Lead sponsor
AbbVie
Industry
Eligibility
25 Years to 89 Years
Enrollment
139 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
25
States / cities
Phoenix, Arizona • Bakersfield, California • Beverly Hills, California + 21 more
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Jul 22, 2026, 11:09 PM EDT
Withdrawn Phase 4 Interventional

Creatine Monohydrate Use for Preventing Altitude Induced Depression

NCT03433651
View directory record Official record
Conditions
Depression
Interventions
Creatine monohydrate, Placebo
Drug
Lead sponsor
Mike O'Callaghan Military Hospital
Federal
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jul 22, 2026, 11:09 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, 11:09 PM 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 Jul 22, 2026, 11:09 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, 11:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Protocol for the Evaluation of Dario™ BGMS Performance at Elevated Altitude

NCT02352298
View directory record Official record
Conditions
Diabetes
Interventions
Dario Blood Glucose Monitoring System, YSI Analyzer
Device
Lead sponsor
LabStyle Innovations Ltd.
Industry
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 8, 2017 · Synced Jul 22, 2026, 11:09 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Breathing Training and Nitrate on Exercise at Simulated Altitude

NCT07216755
View directory record Official record
Conditions
Healthy Adults, Mechanical Ventilation Dependence, Hypoxia, Exercise Training, Exercise Intolerance, Dietary Supplement, Nitrate Supplementation, Inspiratory Muscle Training
Interventions
Respiratory Muscle Training (RMT), Sham Respiratory Muscle Training, Dietary Supplement: Beetroot Juice Concentrate, placebo beverage
Device · Dietary Supplement
Lead sponsor
Embry-Riddle Aeronautical University
Other
Eligibility
18 Years to 40 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Daytona Beach, Florida
Source: ClinicalTrials.gov public record
Updated Oct 14, 2025 · Synced Jul 22, 2026, 11:09 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, 11:09 PM 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 Jul 22, 2026, 11:09 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effects of Naltrexone on Nocturnal Breathing Patterns at Altitude

NCT05037032
View directory record Official record
Conditions
Altitude, Sleep Apnea, Central
Interventions
Naltrexone Pill, Placebo
Drug
Lead sponsor
VA Loma Linda Health Care System
Federal
Eligibility
18 Years to 35 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Apr 25, 2023 · Synced Jul 22, 2026, 11:09 PM 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 Jul 22, 2026, 11:09 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, 11:09 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, 11:09 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, 11:09 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, 11:09 PM EDT
Completed Not applicable Interventional Results available

Use of NIRS in Preterm Population Born at Altitude

NCT04639583
View directory record Official record
Conditions
Prematurity; Extreme
Interventions
Near-infrared spectroscopy (NIRS) utilization
Device
Lead sponsor
University of New Mexico
Other
Eligibility
0 Hours to 24 Hours
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated May 28, 2024 · Synced Jul 22, 2026, 11:09 PM EDT
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 Jul 22, 2026, 11:09 PM 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 Jul 22, 2026, 11:09 PM EDT
Active, not recruiting Phase 2 Interventional

A Study to Evaluate Efficacy and Safety of Intravenous Sabirnetug in Participants With Early Alzheimer's Disease (ALTITUDE-AD)

NCT06335173
View directory record Official record
Conditions
Alzheimer Disease
Interventions
sabirnetug, Placebo
Drug
Lead sponsor
Acumen Pharmaceuticals
Industry
Eligibility
50 Years to 90 Years
Enrollment
542 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
44
States / cities
Carlsbad, California • Fullerton, California • Irvine, California + 40 more
Source: ClinicalTrials.gov public record
Updated Oct 26, 2025 · Synced Jul 22, 2026, 11:09 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, 11:09 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, 11:09 PM EDT