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Showing 1–24 of 206 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Caffeine Clear all
Completed Phase 3 Interventional

Caffeine for Apnea of Prematurity (CAP)

NCT00182312
View directory record Official record
Conditions
Apnea of Prematurity
Interventions
Caffeine citrate injection
Drug
Lead sponsor
McMaster University
Other
Eligibility
Up to 10 Days
Enrollment
2,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2016
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Mar 21, 2018 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Acute Effects of Coffee on Glucose Metabolism

NCT00950898
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
decaff, caffcoff, caffeine, placebo
Other
Lead sponsor
Brooklyn College of the City University of New York
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Aug 2, 2009 · Synced Jul 21, 2026, 7:06 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

The Brain Alerting Mechanism Study

NCT02050386
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Cold pressor stimulation, Sham Stimulation
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 95 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 18, 2016 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Food Matrix Effect on Flavanol Absorption, Metabolism and Excretion: Methylxanthines

NCT03526107
View directory record Official record
Conditions
Healthy
Interventions
CF Control, CF-Theobromine, CF-Caffeine
Other
Lead sponsor
University of California, Davis
Other
Eligibility
25 Years to 60 Years · Male only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
2
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Oct 9, 2022 · Synced Jul 21, 2026, 7:06 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Effects of Caffeine on Women's Sexual Arousal

NCT01242046
View directory record Official record
Conditions
Sexual Behavior
Interventions
Caffeine, Placebo
Dietary Supplement
Lead sponsor
University of Texas at Austin
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Accepts healthy volunteers
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated May 26, 2015 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Military Alerting System for Monitoring Body Temperature During Active Cooling

NCT04431596
View directory record Official record
Conditions
Hyperthermia
Interventions
Forearm cooling, Mist-fan cooling
Device · Other
Lead sponsor
University of Connecticut
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 20, 2020 · Synced Jul 21, 2026, 7:06 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Caffeine in the Second Stage of Labor in Low-risk Nulliparous Mothers at Term

NCT05906303
View directory record Official record
Conditions
Second Stage of Labor
Interventions
Caffeine and Sodium Benzoate Injection, Normal Saline
Drug
Lead sponsor
The Reading Hospital and Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
West Reading, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 13, 2023 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Assessment and Treatment of Caffeine Dependence

NCT00338195
View directory record Official record
Conditions
Self-identified Problematic Caffeine Use, DSM-IV Substance Dependence as Applied to Caffeine
Interventions
Individualized caffeine cessation instructions
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 65 Years
Enrollment
94 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2009
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 6, 2013 · Synced Jul 21, 2026, 7:06 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, 7:06 AM EDT
Not listed Not applicable Interventional

Generalized Seizure Detection And Alerting In The EMU With The Empatica Embrace Watch And Smartphone-Based Alert System

NCT03207685
View directory record Official record
Conditions
Epilepsy
Interventions
Additional Seizure Monitoring
Device
Lead sponsor
Empatica, Inc.
Industry
Eligibility
1 Month and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of a Caffeine Blend on Reaction Time, Mental Performance and Focus in Athletic Males

NCT03019523
View directory record Official record
Conditions
Mental Fatigue
Interventions
Caffeine Blend, Sugar Pill
Dietary Supplement · Other
Lead sponsor
University of Mary Hardin-Baylor
Other
Eligibility
18 Years to 25 Years · Male only
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Belton, Texas
Source: ClinicalTrials.gov public record
Updated Jan 24, 2017 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional

Early Caffeine and LISA Compared to Caffeine and CPAP in Preterm Infants

NCT04209946
View directory record Official record
Conditions
Premature Lungs, Respiratory Distress Syndrome, Surfactant Deficiency Syndrome Neonatal
Interventions
Less Invasive Surfactant Administration LISA, Continuous Positive Airway Pressure CPAP
Procedure
Lead sponsor
Sharp HealthCare
Other
Eligibility
24 Weeks to 29 Weeks
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
3
States / cities
Irvine, California • Loma Linda, California • San Diego, California
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Jul 21, 2026, 7:06 AM EDT
Active, not recruiting Not applicable Interventional

Real-time NOMA Evaluation

NCT06996626
View directory record Official record
Conditions
Critical Illness
Interventions
Revealed Alerts, Unrevealed Alerts
Device
Lead sponsor
David T Huang
Other
Eligibility
18 Years to 100 Years
Enrollment
7,445 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
2
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pilot Study Characterizing the Pharmacokinetic Profile of a Novel Encapsulated Caffeine Beverage in the Fed and Fasted States

NCT05266248
View directory record Official record
Conditions
Pharmacokinetics
Interventions
250 mg encapsulated caffeine
Other
Lead sponsor
PepsiCo Global R&D
Industry
Eligibility
18 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
St. Petersburg, Florida
Source: ClinicalTrials.gov public record
Updated Mar 23, 2022 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Pharmacokinetic Study of an Experimental Paracetamol Formulation

NCT01476176
View directory record Official record
Conditions
Headache, Tension-Type
Interventions
Experimental paracetamol, Paracetamol marketed formulation
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 55 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 23, 2014 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Acute Headache Treatment in Pregnancy: Occipital Nerve Block vs PO Acetaminophen With Caffeine

NCT03951649
View directory record Official record
Conditions
Headache, Pregnancy Related, Occipital Nerve Block
Interventions
Occipital Nerve Block
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
16 Years to 60 Years · Female only
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Dec 19, 2023 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Caffeine on Human Spinal Motoneurons

NCT04891393
View directory record Official record
Conditions
Healthy
Interventions
Coffee, Decaffeinated coffee
Dietary Supplement
Lead sponsor
Temple University
Other
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 7, 2022 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Influence of Caffeinated and Non-caffeinated Pre-workout Supplements on Resistance Exercise Performance

NCT04712578
View directory record Official record
Conditions
Resistance Training, Caffeine, Dietary Supplements
Interventions
Caffeinated pre-workout supplement, Non-caffeinated pre-workout supplement, Placebo
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 40 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Jun 2, 2021 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Estimation of the Effect of Multiple Dose Ritlecitinib (PF-06651600) on the Pharmacokinetics of a Single Dose of Caffeine in Healthy Participants

NCT04655040
View directory record Official record
Conditions
Healthy Participants
Interventions
Caffeine, Ritlecitinib
Drug · Other
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 17, 2021 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Radicle Revive 24: A Study of Health and Wellness Products on Hormonal Health and Associated Health Outcomes in Women With Peri-Menopausal Health Issues

NCT07117994
View directory record Official record
Conditions
Stress, Menopause, Fatigue, Sleep
Interventions
Radicle Revive Placebo Control Form 1, Radicle Revive Active Study Product 1
Dietary Supplement
Lead sponsor
Radicle Science
Industry
Eligibility
40 Years to 105 Years · Female only
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Del Mar, California
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Supplements on Stress Markers

NCT05592561
View directory record Official record
Conditions
Physiological Stress
Interventions
mental stress task
Other
Lead sponsor
Texas State University
Other
Eligibility
18 Years to 40 Years
Enrollment
109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
San Marcos, Texas
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Caffeine Disposition After Inhalation

NCT02184104
View directory record Official record
Conditions
Healthy
Interventions
Caffeine
Dietary Supplement
Lead sponsor
University of Tennessee
Other
Eligibility
21 Years to 45 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 25, 2017 · Synced Jul 21, 2026, 7:06 AM EDT
Completed Phase 2 Interventional Results available

The Effect of CPC on Aborting Tilt Induced Syncope in Patients With a History of Vasovagal Syncope or Near Syncope

NCT04972123
View directory record Official record
Conditions
Syncope, Vasovagal
Interventions
CPC - Capsaicin, Phenylephrine, Caffeine, Tilt Table Test, Placebo
Drug · Diagnostic Test
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 50 Years
Enrollment
143 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 16, 2024 · Synced Jul 21, 2026, 7:06 AM EDT
Not yet recruiting No phase listed Observational

REVIVE Prospective Registry Cohort Study

NCT07429890
View directory record Official record
Conditions
Oropharyngeal Dysphagia
Interventions
Other: No Intervention (subjects were previously treated with Iltamiocel). This is a observational study and all participants will be observed with no intervention.
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2032
U.S. locations
2
States / cities
Sacramento, California • San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 17, 2026 · Synced Jul 21, 2026, 7:06 AM EDT