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Showing 1–24 of 37 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Alertness Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Effect of a Wrist-worn Device That Produces a Small Vibration on Sleep and Performance That Can Occur During and After Night Shift Work

NCT06665672
View directory record Official record
Conditions
Sleep Duration, Psychomotor Performance
Interventions
Wrist worn vibro-acoustic device
Device
Lead sponsor
Daniel Patterson, PhD, NRP
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 2, 2026 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Phase 3 Interventional

A Safety and Efficacy Study of Dexmedetomidine in Patients Requiring Sedation During Monitored Anesthesia Care (MAC)

NCT00398827
View directory record Official record
Conditions
Anesthesia, Surgical Procedures, Elective
Interventions
Dexmedetomidine, Placebo
Drug
Lead sponsor
Hospira, now a wholly owned subsidiary of Pfizer
Industry
Eligibility
18 Years and older
Enrollment
326 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
27
States / cities
Birmingham, Alabama • Loma Linda, California • Miami, Florida + 18 more
Source: ClinicalTrials.gov public record
Updated Jul 22, 2015 · Synced Jul 21, 2026, 7:05 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Caffeine on Chess Performance and Cognitive Function in Professional Chess Players

NCT07641335
View directory record Official record
Conditions
Cognitive Performance, Attention, Reaction Time, Caffeine
Interventions
Caffeinated Coffee, Decaffeinated Coffee Placebo
Dietary Supplement
Lead sponsor
St. Louis University
Other
Eligibility
18 Years to 50 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Jul 21, 2026, 7:05 AM EDT
Terminated Not applicable Interventional Results available

SNAP VS BIS(OAA/S) Scale During a Sedation Regimen With and Without Ketamine

NCT01250418
View directory record Official record
Conditions
Pain
Interventions
Ketamine group
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 64 Years · Female only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 27, 2014 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Chronic Circadian Disruption vs. Chronic Sleep Restriction on Metabolism

NCT02171273
View directory record Official record
Conditions
Aging, Sleep Restriction, Circadian Disruption
Interventions
Circadian Disruption, Sleep Restriction, Control
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
21 Years to 70 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 19, 2019 · Synced Jul 21, 2026, 7:05 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Clinical Proof-of-concept Study on Immune Surveillance and Alertness

NCT05431751
View directory record Official record
Conditions
Immune Surveillance
Interventions
Whole Algae
Dietary Supplement
Lead sponsor
Natural Immune Systems Inc
Other
Eligibility
18 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Klamath Falls, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 6, 2023 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sounds Locked to ElectroEncephalogram Phase For the Acceleration of Sleep Onset Time

NCT05743114
View directory record Official record
Conditions
Sleep, Sleep Disturbance
Interventions
Elemind Neuromodulation (ENMod)
Device
Lead sponsor
Elemind Technologies, Inc.
Industry
Eligibility
21 Years to 55 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 19, 2024 · Synced Jul 21, 2026, 7:05 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Intelligent Intensive Care Unit

NCT02465307
View directory record Official record
Conditions
Delirium, Confusion
Interventions
Confusion Assessment Method, Accelerometer, Commercially available camera, Internet Pod (iPod), Cortisol Swab
Behavioral · Device · Diagnostic Test
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2028
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 28, 2025 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Randomized, Placebo-Controlled, Double-Blind, Crossover Study to Evaluate the Effects of Three Doses of the Dietary Supplement oréVida™ on Alertness, Attention and Concentration in Healthy Men and Women

NCT01143194
View directory record Official record
Conditions
Attention, Memory, Alertness
Interventions
oréVida™, Placebo
Dietary Supplement
Lead sponsor
dsm-firmenich Switzerland AG
Industry
Eligibility
35 Years to 50 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 8, 2011 · Synced Jul 21, 2026, 7:05 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

VR Breaks on Shift-worker Alertness

NCT04132141
View directory record Official record
Conditions
Burnout, Professional
Interventions
Virtual Reality Headset with curated content
Other
Lead sponsor
George Washington University
Other
Eligibility
18 Years to 65 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Dec 13, 2021 · Synced Jul 21, 2026, 7:05 AM EDT
Not yet recruiting Phase 4 Interventional

Impact of Daridorexant on Sleep, Daytime Alertness, and Smoking

NCT07328594
View directory record Official record
Conditions
Smoking, Nicotine, Tobacco, Addiction, Substance Use Disorders, Insomnia, Sleep
Interventions
Daridorexant 50 mg, Placebo
Drug · Other
Lead sponsor
Legacy Health System
Other
Eligibility
18 Years to 55 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 8, 2026 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving Outcomes for Patients With SDB and Insufficient Sleep

NCT04279834
View directory record Official record
Conditions
Sleep Apnea, Insufficient Sleep Syndrome, Sleep, Hypertension
Interventions
PAP Treatment, Sleep Education I
Behavioral
Lead sponsor
Wayne State University
Other
Eligibility
18 Years and older
Enrollment
558 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 2, 2025 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Characterizing the Pharmacokinetic Profile of a Novel Encapsulated Caffeine Beverage and Associated Mood and Physiological Effects

NCT05096780
View directory record Official record
Conditions
Alertness
Interventions
Flavored caffeinated beverage
Other
Lead sponsor
PepsiCo Global R&D
Industry
Eligibility
18 Years to 55 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Dilworth, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 23, 2022 · Synced Jul 21, 2026, 7:05 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Evaluating the Relationship Between Sleep-Disordered Breathing and Daytime Alertness

NCT00393913
View directory record Official record
Conditions
Sleep Apnea, Obstructive
Interventions
Continuous Positive Airway Pressure (CPAP)
Device
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older
Enrollment
144 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 4, 2016 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Coffeeberry on Mood, Motivation and Cognitive Performance

NCT04974606
View directory record Official record
Conditions
Fatigue, Mental, Alertness, Mood, Motivation, Cognitive Performance
Interventions
Cherry-flavored still beverage, Placebo cherry-flavored still beverage
Dietary Supplement · Other
Lead sponsor
PepsiCo Global R&D
Industry
Eligibility
17 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 22, 2021 · Synced Jul 21, 2026, 7:05 AM EDT
Withdrawn Early Phase 1 Interventional Accepts healthy volunteers

tFUS to Enhance Alertness and Performance

NCT06461221
View directory record Official record
Conditions
Reaction Time, Alertness
Interventions
Transcranial Focused Ultrasound
Device
Lead sponsor
Medical University of South Carolina
Other
Eligibility
22 Years to 55 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Sep 7, 2025 · Synced Jul 21, 2026, 7:05 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Examining the Biological Factors That Affect Sleep Duration

NCT00607204
View directory record Official record
Conditions
Sleep, Circadian Rhythm, Cognitive Performance
Interventions
Not listed
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 35 Years
Enrollment
119 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 30, 2013 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Not applicable Interventional Results available

Stimulation of Cingulo-opercular Alertness Network

NCT04817891
View directory record Official record
Conditions
Lewy Body Disease, Lewy Body Variant of Alzheimer Disease, Lewy Body Dementia With Behavioral Disturbance
Interventions
HD-tDCS
Device
Lead sponsor
University of Michigan
Other
Eligibility
50 Years to 90 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 21, 2025 · Synced Jul 21, 2026, 7:05 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

CNS Correlates of Extended Sleep Restriction

NCT05547880
View directory record Official record
Conditions
Sleep Restriction
Interventions
[11C]ER176
Drug
Lead sponsor
Walter Reed Army Institute of Research (WRAIR)
Federal
Eligibility
18 Years to 39 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated May 17, 2025 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Acute Effects of Onnit Alpha Brain on Cognition and Mood States

NCT07495592
View directory record Official record
Conditions
Cognitive, Mood and Cognitive Performance, Sleep Deprivation, Executive Function (Cognition), Fatigue
Interventions
Alpha Brain proprietary cognitive dietary supplement, Alpha Brain 2.0 proprietary cognitive dietary supplement, Controlled Placebo
Dietary Supplement
Lead sponsor
Applied Science & Performance Institute
Industry
Eligibility
20 Years to 59 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Jul 21, 2026, 7:05 AM EDT
Enrolling by invitation Early Phase 1 Interventional Accepts healthy volunteers

Effectiveness of Microdosed GLP-1 in Improving Health, Quality of Life, and Longevity Measures

NCT07092605
View directory record Official record
Conditions
Longevity, Quality of Life, Mood, Inflammation, Immune Health, Pain Management, Weight Management, Alertness
Interventions
GLP-1, Placebo
Drug
Lead sponsor
AgelessRx
Industry
Eligibility
18 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 29, 2025 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of the Amino Acid L-Theanine on Alertness and Vigilance

NCT01851122
View directory record Official record
Conditions
Theanine, (L)-Isomer
Interventions
L-theanine capsule, Placebo capsule
Dietary Supplement
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Sugar Land, Texas
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Jul 21, 2026, 7:05 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Acoustic Stimulation During Restricted Sleep After Sleep Deprivation

NCT05309473
View directory record Official record
Conditions
Sleep Deprivation, Sleep Restriction, Acoustic Stimulation, Performance, Alertness
Interventions
Philips SmartSleep Acoustic Stimulation Device, Sham (no Acoustic Stimulation)
Device
Lead sponsor
Walter Reed Army Institute of Research (WRAIR)
Federal
Eligibility
18 Years to 39 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 22, 2024 · Synced Jul 21, 2026, 7:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Different Colors of Light on Human Physiology

NCT00200863
View directory record Official record
Conditions
Healthy, Circadian Rhythm
Interventions
Monochromatic visible light exposure
Device
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 30 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 11, 2014 · Synced Jul 21, 2026, 7:05 AM EDT