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Showing 1–18 of 18 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Oral capsaicin Clear all
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Reduction in Pain Intensity Following IV or Oral Pain-relieving Products

NCT02678416
View directory record Official record
Conditions
Pain
Interventions
IV Acetaminophen (Treatment A), Oral Acetaminophen (Treatment B), Placebo (Treatment C), Morphine (Treatment D)
Drug · Other
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
79 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 4, 2020 · Synced Sep 6, 2026, 1:55 PM EDT
Not yet recruiting Phase 4 Interventional

Modality Choice Before and After Failure for the Treatment of Painful Diabetic Neuropathy

NCT07795593
View directory record Official record
Conditions
Painful Diabetic Neuropathy (PDN), Diabetic Nephropathies
Interventions
Cognitive Behavioral Therapy (CBT), Oral Medication, Topical Medication
Device · Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
23
States / cities
Stanford, California • Jacksonville, Florida • Chicago, Illinois + 17 more
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Early Phase 1 Interventional

Accurate Screening Tools for Dysphagia in Amyotrophic Lateral Sclerosis (ALS)

NCT02710162
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
Micro Mouth Pressure Meter, Iowa Oral Performance Instrument, Electrical Impedance Myography, Capsaicin, Videofluoroscopic Swallowing Study, Pulmonary Function Testing, Swallowing Related Quality of Life Questionnaire, Functional Oral Intake Scale, Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised, Eating Assessment Tool-10, Communicative Effectiveness Survey, The Center for Neurologic Studies Bulbar Function Scale
Device · Drug · Procedure + 1 more
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 85 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 20, 2017 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Phase 4 Interventional Results available

Antitussive Effect of a Naturally Flavored Syrup Containing Diphenhydramine, Compared With Dextromethorphan and Placebo

NCT02062710
View directory record Official record
Conditions
Cough Reflex Sensitivity
Interventions
diphenhydramine/phenylephrine/cocoa; dextromethorophan; placebo, diphenhydramine/phenylephrine/cocoa; placebo; dextromethorphan, dextromethorphan; diphenhydramine/phenylephrine/cocoa; placebo, dextromethorophan; placebo; diphenhydramine/phenylephrine/cocoa, placebo; diphenhydramine/phenylephrine/cocoa; dextromethorphan, placebo; dextromethorphan; diphenhydramine/phenylephrine/cocoa
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Feb 27, 2018 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Efficacy and Safety of a Nutraceutical Supplement With Standardized Botanicals in Peri-menopausal and Menopausal Women With Thinning Hair

NCT04048031
View directory record Official record
Conditions
Hair Thinning
Interventions
Nutrafol Supplement Capsules, Placebo Capsules
Dietary Supplement · Other
Lead sponsor
Ablon Skin Institute Research Center
Other
Eligibility
40 Years to 65 Years · Female only
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Manhattan Beach, California
Source: ClinicalTrials.gov public record
Updated Apr 5, 2025 · Synced Sep 6, 2026, 1:55 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Stimulation of Sensation and Improvement in Swallowing Using Oral Capsaicin

NCT01053286
View directory record Official record
Conditions
Dysphagia, Gastroesophageal Reflux
Interventions
Not listed
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Phase 3 Interventional

Capsaicin Lozenges in Treating Patients With Mucositis Caused by Radiation Therapy

NCT00003610
View directory record Official record
Conditions
Head and Neck Cancer, Radiation Toxicity
Interventions
capsaicin, placebo, radiation therapy
Dietary Supplement · Other · Radiation
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2006
U.S. locations
17
States / cities
Scottsdale, Arizona • Peoria, Illinois • Urbana, Illinois + 14 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2016 · Synced Sep 6, 2026, 1:55 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Improving Diagnostic Standards in Dysphagia

NCT04773184
View directory record Official record
Conditions
Dysphagia
Interventions
Fiberoptic Endoscopic Evaluation of Swallowing, Videofluoroscopic Swallowing Study, Voluntary Peak Cough Flow Testing, Iowa Oral Performance Instrument, Capsaicin Challenge, Pulmonary Function Testing, Voicing Tasks
Procedure · Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 90 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 16, 2024 · Synced Sep 6, 2026, 1:55 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Dissecting the Heterogeneity of Oral Cancer Pain

NCT05024383
View directory record Official record
Conditions
Oral Squamous Cell Carcinoma
Interventions
Chemical sensitivity, Mechanical sensitivity
Other
Lead sponsor
NYU College of Dentistry
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 27, 2022 · Synced Sep 6, 2026, 1:55 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Human Experimental Models of Pain (HEMP)

NCT07549490
View directory record Official record
Conditions
Acute Pain
Interventions
Placebo, Naproxen, Pregabalin
Drug
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
18 Years to 100 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 6, 2026, 1:55 PM EDT
Enrolling by invitation Phase 1 Interventional Accepts healthy volunteers

Pain Biomarker Study

NCT03511846
View directory record Official record
Conditions
Migraine, Cluster Headache, Trigeminal Autonomic Cephalgia, Hemicrania Continua, Paroxysmal Hemicrania, SUNCT, Short-Lasting Unilateral Neuralgiform Headache With Conjunctival Injection and Tearing
Interventions
Oral capsaicin, Topical capsaicin, Intranasal capsaicin, Cold Water Irrigation, Medical Air, Low Flow Oxygen, High Flow Oxygen
Drug · Other
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years and older
Enrollment
371 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Respiratory Kinematics of Cough in Healthy Older Adults and Parkinson's Disease

NCT02183519
View directory record Official record
Conditions
Cough, Parkinson's Disease
Interventions
Capsaicin, Voluntary cough test
Drug · Other
Lead sponsor
University of Florida
Other
Eligibility
55 Years to 85 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
2
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 23, 2017 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nutraceutical Supplement With Standardized Botanicals in Males With Thinning Hair

NCT05339958
View directory record Official record
Conditions
Hair Thinning
Interventions
Nutrafol® Men Hair Growth Nutraceutical, Placebo Supplement
Dietary Supplement · Other
Lead sponsor
Nutraceutical Wellness Inc.
Industry
Eligibility
21 Years to 55 Years · Male only
Enrollment
112 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
2
States / cities
Manhattan Beach, California • San Diego, California
Source: ClinicalTrials.gov public record
Updated Jul 31, 2023 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Efficacy and Safety of a Nutraceutical Supplement With Standardized Botanicals in Women With Thinning Hair

NCT03206567
View directory record Official record
Conditions
Hair Thinning
Interventions
Nutrafol Supplement capsules, Placebo capsules
Dietary Supplement · Other
Lead sponsor
Ablon Skin Institute Research Center
Other
Eligibility
21 Years to 65 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Manhattan Beach, California
Source: ClinicalTrials.gov public record
Updated Aug 6, 2019 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety, Tolerability and Pharmacokinetics of Multiple Doses of AV-101 in Healthy Volunteers

NCT01483846
View directory record Official record
Conditions
Neuropathic Pain
Interventions
AV-101, Placebo
Drug
Lead sponsor
VistaGen Therapeutics, Inc.
Industry
Eligibility
21 Years to 60 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Dec 19, 2012 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Early Phase 1 Interventional

Respiratory Strength Training in Persons With Amyotrophic Lateral Sclerosis (ALS)

NCT02710110
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
PowerLung trainer, Micro Mouth Pressure Meter, Pulmonary Function Testing, Videofluoroscopic swallowing study, Swallowing Quality of Life Questionnaire, Iowa Oral Pressure Instrument, Capsaicin
Device · Procedure · Other + 1 more
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 85 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 26, 2020 · Synced Sep 6, 2026, 1:55 PM EDT
Completed No phase listed Observational

Delineating Swallowing Impairment and Decline in ALS

NCT02962050
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
Videofluoroscopic Swallowing Study (VFSS), Voluntary Peak Cough Flow Testing, Iowa Oral Performance Instrument, Capsaicin Challenge, Pulmonary Function Testing, Eating Assessment Tool 10, The Center for Neurologic Study Bulbar Function Scale
Procedure · Device · Drug + 1 more
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 90 Years
Enrollment
109 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
2
States / cities
Gainesville, Florida • Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Feb 22, 2023 · Synced Sep 6, 2026, 1:55 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Fenobam on Heat/Capsaicin Induced Hyperalgesia in Healthy Volunteers

NCT01981395
View directory record Official record
Conditions
Hyperalgesia, Allodynia
Interventions
Fenobam, Placebo
Drug
Lead sponsor
Laura Cavallone
Other
Eligibility
18 Years to 50 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 28, 2016 · Synced Sep 6, 2026, 1:55 PM EDT