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ClinicalTrials.gov public records Last synced Oct 20, 2026, 6:16 PM EDT

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Showing 49–66 of 66 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Smell Loss Clear all
Completed No phase listed Observational Accepts healthy volunteers

The Effects of GLP-1 Receptor Agonists on Chemosensory Function and Ingestive Behavior

NCT07611201
View directory record Official record
Conditions
Obesity, Overweight, Taste Perception, Olfaction, Eating Behavior, Appetite
Interventions
Not listed
Lead sponsor
Purdue University
Other
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Oct 20, 2026, 6:16 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Longitudinal Deep Phenotyping of Central Mechanisms in Dysosmia: A Pilot Study Using Electrobulbogram (EBG), Functional MRI (fMRI), and Diffusion-Weighted Imaging (DWI)

NCT07149428
View directory record Official record
Conditions
Respiratory Tract Infection, Smell Disorder, Influenza, Rhinosinusitis, COVID-19, Depression, Parosmia, Hyposomia, Normosomia, Anosmia
Interventions
Not listed
Lead sponsor
National Institute on Deafness and Other Communication Disorders (NIDCD)
NIH
Eligibility
18 Years to 99 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 9, 2026 · Synced Oct 20, 2026, 6:16 PM EDT
Completed No phase listed Observational

Stellate Ganglion Block to Treat Long COVID 19 Case Series

NCT05812209
View directory record Official record
Conditions
Long COVID, Long Covid19, Post-COVID-19 Syndrome, Post Acute COVID-19 Syndrome, Dysautonomia, Anosmia, Dysgeusia, Brain Fog, Muscle Pain, Shortness of Breath, Dizziness, Fatigue Post Viral, Cough, Menstrual Cycle Abnormal, Pain
Interventions
Stellate Ganglion Block
Procedure
Lead sponsor
Metamorphosis LTD
Other
Eligibility
Not listed
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Cañon City, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 13, 2023 · Synced Oct 20, 2026, 6:16 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Mechanisms Underlying Individual Variations of Taste and Smell in Obesity

NCT04714892
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
NIH
Eligibility
18 Years to 65 Years
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 13, 2026 · Synced Oct 20, 2026, 6:16 PM EDT
Completed Phase 4 Interventional Results available

Olfactory Deficits in MCI as Predictor of Improved Cognition on Donepezil

NCT01845636
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Donepezil, Atropine
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
55 Years to 95 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 9, 2018 · Synced Oct 20, 2026, 6:16 PM EDT
Not listed Phase 4 Interventional

A Study Assessing Change in Sense of Smell After Rasagiline Use in Parkinson's Patients

NCT01007630
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Rasagiline, Placebo
Drug
Lead sponsor
The Parkinson's Institute
Other
Eligibility
Up to 90 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Sunnyvale, California
Source: ClinicalTrials.gov public record
Updated Dec 2, 2013 · Synced Oct 20, 2026, 6:16 PM EDT
Recruiting Not applicable Interventional

Olfactory Training in Mild Cognitive Impairment

NCT06825403
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Olfactory Memory Training, Visual Memory Training
Behavioral
Lead sponsor
Jeffrey Motter
Other
Eligibility
55 Years to 89 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 4, 2026 · Synced Oct 20, 2026, 6:16 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Sensory Enrichment for Older Adults

NCT03914989
View directory record Official record
Conditions
Cognitive Function
Interventions
olfactory enrichment (essential oils)
Other
Lead sponsor
University of California, Irvine
Other
Eligibility
60 Years to 85 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated Mar 24, 2023 · Synced Oct 20, 2026, 6:16 PM EDT
Withdrawn Phase 2 Interventional

Trial of Directed High-dose Nasal Steroids on Residual Smell Loss in Sinus Patients After Sinus Surgery

NCT01814618
View directory record Official record
Conditions
Olfaction Disorders, Sinusitis, Paranasal Sinus Diseases
Interventions
Budesonide Respules
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 84 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 6, 2016 · Synced Oct 20, 2026, 6:16 PM EDT
Completed Phase 4 Interventional Results available

Olfactory Deficits and Donepezil Treatment in Cognitively Impaired Elderly

NCT01951118
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment, Delirium, Dementia, Amnestic, Cognitive Disorders
Interventions
Donepezil
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
55 Years to 95 Years
Enrollment
121 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 13, 2020 · Synced Oct 20, 2026, 6:16 PM EDT
Completed Not applicable Interventional Results available

Acupuncture Therapy for COVID-Related Olfactory Loss

NCT04952389
View directory record Official record
Conditions
Olfactory Dysfunction, COVID-19
Interventions
Acupuncture Therapy, Budesonide, Olfactory Training
Device · Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 12, 2024 · Synced Oct 20, 2026, 6:16 PM EDT
Enrolling by invitation No phase listed Observational

Firefighter's Longitudinal Airway and Respiratory Exposome/Multiome Study (FLARES)

NCT07867184
View directory record Official record
Conditions
Anosmia, Chronic Obstructive Pulmonary Disease, Hyposmia, Chronic Rhinosinusitis, Asthma
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
350 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2036
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 20, 2026 · Synced Oct 20, 2026, 6:16 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

cAMP (Cyclic Adenosine Monophosphate) Levels in the Nose

NCT01332825
View directory record Official record
Conditions
Olfactory Disorder
Interventions
saline nasal irrigation
Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 65 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Dec 12, 2013 · Synced Oct 20, 2026, 6:16 PM EDT
Not yet recruiting Early Phase 1 Interventional Accepts healthy volunteers

In Vivo Imaging of the Olfactory Epithelium Using Confocal Laser Endomicroscopy

NCT07546617
View directory record Official record
Conditions
Endonasal Surgery, Endoscopic Sinus Surgery, Olfactory Dysfunction
Interventions
CONVIVO system, Fluorescein injection, USP 10%
Device · Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Oct 20, 2026 · Synced Oct 20, 2026, 6:16 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Taste Perception and Chronic Disease Risk

NCT01023906
View directory record Official record
Conditions
Cardiovascular Disease, Diabetes, Obesity, Metabolic Syndrome, Aging
Interventions
Not listed
Lead sponsor
Tufts University
Other
Eligibility
18 Years to 85 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 23, 2014 · Synced Oct 20, 2026, 6:16 PM EDT
Completed Not applicable Interventional

Visual-OLfactory Training in Participants With COVID-19 Resultant Loss of Smell

NCT04710394
View directory record Official record
Conditions
Anosmia, Covid19, Ageusia, Hyposmia, Hypogeusia, SARS-CoV-2 Infection, COVID-19 Pandemic
Interventions
Smell Training
Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 21, 2022 · Synced Oct 20, 2026, 6:16 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Experiments to Test How and Why the Sense of Smell Differs Between People

NCT00220038
View directory record Official record
Conditions
Specific Anosmias
Interventions
smell tests
Behavioral
Lead sponsor
Rockefeller University
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2010
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 11, 2012 · Synced Oct 20, 2026, 6:16 PM EDT
Completed Phase 2 Interventional Results available

Directed Topical Drug Delivery for Treatment for PASC Hyposmia

NCT05970731
View directory record Official record
Conditions
Post Acute Sequelae Covid-19 Hyposmia
Interventions
Beclomethasone, Placebo, Microsponge
Drug · Other · Device
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 19, 2026 · Synced Oct 20, 2026, 6:16 PM EDT