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ClinicalTrials.gov public records Last synced Oct 20, 2026, 5:38 PM EDT

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Showing 25–48 of 66 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Smell Loss Clear all
Recruiting Not applicable Interventional

Olfactory Biopsies

NCT07021040
View directory record Official record
Conditions
Alzheimer Disease, Smell Loss, Smell Dysfunction
Interventions
olfactory testing, Odor stimulation, Olfactory biopsy
Diagnostic Test · Other · Procedure
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 12, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Withdrawn Phase 2 Interventional

Coronavirus Smell Therapy for Anosmia Recovery

NCT04422275
View directory record Official record
Conditions
Anosmia
Interventions
Budesonide, High-Concentration Essential Oil, Placebo, Low-Concentration Essential Oil
Drug · Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 2, 2021 · Synced Oct 20, 2026, 5:38 PM EDT
Completed Not applicable Interventional

What the Nose Knows: Hedonic Capacity, Psychosocial Interventions and Outcomes in Schizophrenia

NCT05282186
View directory record Official record
Conditions
Schizophrenia
Interventions
Cognitive Enhancement Therapy, Social Skills Training
Behavioral
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 10, 2025 · Synced Oct 20, 2026, 5:38 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Longitudinal At Home Smell Testing to Detect Infection by SARS-CoV-2

NCT05040659
View directory record Official record
Conditions
Anosmia, Asymptomatic COVID-19, COVID-19 Respiratory Infection, Influenza, Healthy, PASC Post Acute Sequelae of COVID 19
Interventions
AROMHA Longitudinal Smell Test
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 100 Years
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 6, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Completed No phase listed Observational

Decrease in Sense of Smell and Associated Cognitive Decline in Parkinson's Disease

NCT01572142
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Not listed
Lead sponsor
University of Michigan
Other
Eligibility
50 Years and older
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 29, 2017 · Synced Oct 20, 2026, 5:38 PM EDT
Not yet recruiting Not applicable Interventional

SniffTrain: Effectiveness of Sniff Training in the Treatment of Post-Viral Anosmia

NCT07857083
View directory record Official record
Conditions
Post-viral Anosmia, Anosmia, Hyposmia
Interventions
Sniff Training Kits
Other
Lead sponsor
University of Virginia
Other
Eligibility
10 Years to 60 Years
Enrollment
204 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2031
U.S. locations
3
States / cities
Baltimore, Maryland • Charleston, South Carolina • Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Olfactory Function and Model-Based Behavior in People Living With HIV and SUD

NCT07637669
View directory record Official record
Conditions
HIV, Substance Use Disorder
Interventions
Not listed
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 65 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2031
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 20, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Completed Phase 3 Interventional

Megestrol to Limit Weight Loss and Improve Quality of Life in Treating Patients With Head and Neck Cancer

NCT00006799
View directory record Official record
Conditions
Anorexia, Cachexia, Head and Neck Cancer, Quality of Life
Interventions
megestrol acetate, quality-of-life assessment
Drug · Procedure
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 120 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2002
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 9, 2021 · Synced Oct 20, 2026, 5:38 PM EDT
Terminated Not applicable Interventional

Olfactory Training in Improving Sense of Smell After Radiation Therapy in Patients With Paranasal Sinus or Nasopharyngeal Cancer

NCT03049358
View directory record Official record
Conditions
Stage 0 Nasopharyngeal Carcinoma, Stage 0 Paranasal Sinus Cancer, Stage I Nasopharyngeal Carcinoma, Stage I Paranasal Sinus Cancer, Stage II Nasopharyngeal Carcinoma, Stage II Paranasal Sinus Cancer, Stage IIA Nasopharyngeal Carcinoma, Stage IIB Nasopharyngeal Carcinoma, Stage III Nasopharyngeal Carcinoma, Stage III Paranasal Sinus Cancer, Stage IV Nasopharyngeal Carcinoma, Stage IV Paranasal Sinus Cancer, Stage IVA Nasopharyngeal Carcinoma, Stage IVA Paranasal Sinus Cancer, Stage IVB Nasopharyngeal Carcinoma, Stage IVB Paranasal Sinus Cancer, Stage IVC Nasopharyngeal Carcinoma, Stage IVC Paranasal Sinus Cancer
Interventions
Physiologic Testing, Quality-of-Life Assessment, Sham Intervention, Therapeutic Procedure, rose essential oil, lemon essential oil, clove essential oil, eucalyptus essential oil, canola oil placebo
Other · Procedure
Lead sponsor
Stanford University
Other
Eligibility
19 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Feb 5, 2019 · Synced Oct 20, 2026, 5:38 PM EDT
Not listed Phase 1Phase 2 Interventional

Recovering Damaged Cells for Sequelae Caused by COVID-19, SARS-CoV-2

NCT04846010
View directory record Official record
Conditions
Sequelae of; Infection, Post Infection Glomerulonephritis, Post-Infectious Peripheral Neuralgia, Post-Infectious Disorder (Disorder), Post-Infectious Arthritis, Post-Infectious Polyneuritis, Post-Infectious Parkinsonism, Post-Infectious Hypothyroidism, Post Infectious Osteoarthritis, Anxiety Disorders, Depression, Depression, Anxiety, Depression, Bipolar, Insomnia, GERD, Gastro Esophageal Reflux, Hepatitis, Glomerulonephritis
Interventions
PurWet, FurFat, PurApo, PurPhl, PurClo, PurInf, Smoliv
Combination Product
Lead sponsor
All Natural Medicine Clinic, LLC
Other
Eligibility
Not listed
Enrollment
2,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated May 26, 2021 · Synced Oct 20, 2026, 5:38 PM EDT
Completed Not applicable Interventional

At-Home Olfactory Training

NCT03611673
View directory record Official record
Conditions
Olfactory Disorder
Interventions
Smell Test
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 20, 2023 · Synced Oct 20, 2026, 5:38 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

The Effects of Smell on Mood and Physical Responses

NCT00097253
View directory record Official record
Conditions
Stress, Anxiety, Depression
Interventions
Exposure to relaxant and stimulant odors
Behavioral
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
18 Years to 44 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 18, 2010 · Synced Oct 20, 2026, 5:38 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Impact of Methadone Maintenance Therapy on Food Reward Processing in Opioid Dependence

NCT03575273
View directory record Official record
Conditions
Opioid Dependence, Obesity
Interventions
Sniffin' Sticks Odor Identification and Hedonic Scale, Sucrose Taste Preference Assessment, Food Preferences Task, Progressive Ratio (PR) Task, Clinical Electrophysiology, Standardized Meal and Hunger and Satiety Ratings
Behavioral · Procedure · Dietary Supplement
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 60 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
2
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 16, 2020 · Synced Oct 20, 2026, 5:38 PM EDT
Recruiting Phase 2 Interventional

Study of Chemosensory Enhancement Through Neuromodulation Training (SCENT): Open Label

NCT07689773
View directory record Official record
Conditions
Olfactory Impairment
Interventions
Trigeminal Nerve Stimulation-enhanced Smell Training
Combination Product
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 80 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Recruiting Phase 2Phase 3 Interventional

Study of Chemosensory Enhancement Through Neuromodulation Training (SCENT for Long COVID)

NCT05855369
View directory record Official record
Conditions
Smell Dysfunction, Olfactory Disorder, Long COVID
Interventions
Trigeminal Nerve Stimulation (TNS), Active Smell Training (ST), Placebo Smell Training (PBO)
Device · Other
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 65 Years
Enrollment
145 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 2, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Active, not recruiting Phase 2 Interventional

Sodium Citrate in Smell Retraining for People With Post-COVID-19 Olfactory Dysfunction

NCT06204432
View directory record Official record
Conditions
Long Haul COVID-19, Post-Acute COVID-19 Syndrome, Anosmia, Olfaction Disorders
Interventions
Sodium Citrate, Normal Saline, Olfactory Training Kit - "The Olfactory Kit, by AdvancedRx"
Drug · Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Oct 20, 2026, 5:38 PM EDT
Recruiting Not applicable Interventional

Scents of Progress: Leveraging a Novel Device for Olfactory Training in Older Adults

NCT06733636
View directory record Official record
Conditions
Olfactory Dysfunction, Smell Loss, Anosmia, Hyposmia
Interventions
Sudoku Puzzles, ScentCare (Olfactory Training Device)
Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
60 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Cognitive and Immunologic Profiles of Patients With Olfactory Dysfunction After Smell Training

NCT07681973
View directory record Official record
Conditions
Smell Loss, Chronic Rhinosinusitis (CRS)
Interventions
Smell Training
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 2, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Stellate Ganglion Block for COVID-19-Induced Olfactory Dysfunction

NCT05445921
View directory record Official record
Conditions
Anosmia, Hyposmia, Parosmia, Olfactory Disorder
Interventions
Stellate Ganglion Block
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Completed No phase listed Observational Results available

Validation of a Rapid Quantitative Test for Loss of Smell in COVID-19 Subjects

NCT04431908
View directory record Official record
Conditions
COVID-19
Interventions
olfactory device
Device
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
1,320 participants
Timeline
2020
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 2, 2021 · Synced Oct 20, 2026, 5:38 PM EDT
Completed Phase 2 Interventional Results available

Smell in COVID-19 and Efficacy of Nasal Theophylline (SCENT 3)

NCT05947643
View directory record Official record
Conditions
COVID-19
Interventions
theophylline, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 75 Years
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 20, 2025 · Synced Oct 20, 2026, 5:38 PM EDT
Recruiting No phase listed Observational

Olfactory Cleft Obstruction and Electrophysiological Field Potentials Predict Olfactory Restoration by Dupilumab in CRSwNP Patients.

NCT06892704
View directory record Official record
Conditions
Chronic Rhinosinusitis Phenotype With Nasal Polyps (CRSwNP), Smell Loss
Interventions
Dupilumab - Standard Dose
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Oct 20, 2026, 5:38 PM EDT
Active, not recruiting No phase listed Observational

Early Longitudinal Imaging in Parkinson's Progression Markers Initiative Using [¹⁸F] AV-133 and DaTscan™

NCT04507139
View directory record Official record
Conditions
Parkinson Disease
Interventions
Not listed
Lead sponsor
Michael J. Fox Foundation for Parkinson's Research
Other
Eligibility
30 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
3
States / cities
New Haven, Connecticut • Boston, Massachusetts • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 31, 2024 · Synced Oct 20, 2026, 5:38 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Study of CYR-064 Versus Placebo in Patients.

NCT06019000
View directory record Official record
Conditions
Hyposmia
Interventions
CYR-064
Combination Product
Lead sponsor
Cyrano Therapeutics, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
151 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
14
States / cities
Colorado Springs, Colorado • Boca Raton, Florida • Plantation, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Oct 20, 2026, 5:38 PM EDT