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ClinicalTrials.gov public records Last synced May 21, 2026, 10:50 PM EDT

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Showing 1–24 of 32 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Smell Dysfunction Clear all
Completed Not applicable Interventional
View directory record Official record
Conditions
Olfactory Disorder, Olfaction Disorders, Olfactory Nerve Injuries, Olfactory Nerve Disorder, Olfactory Nerve Diseases, Covid19, Post-Viral Disorder
Interventions
Injection into olfactory cleft
Procedure
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
2
States / cities
San Diego, California • Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 12, 2023 · Synced May 21, 2026, 10:50 PM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Olfactory Disorder, Anosmia, Viral Infection, Theophylline Causing Adverse Effects in Therapeutic Use, Smell Disorder
Interventions
Theophylline, Saline Nasal
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 30, 2022 · Synced May 21, 2026, 10:50 PM EDT
Recruiting Not applicable Interventional
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 12, 2026 · Synced May 21, 2026, 10:50 PM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Covid19, Anosmia, Olfactory Disorder, Covid-19 Pandemic, SARS-CoV-2 Infection, Hyposmia, Ageusia, Hypogeusia
Interventions
Theophylline Powder, Placebo Comparator
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 23, 2023 · Synced May 21, 2026, 10:50 PM EDT
Completed Phase 4 Interventional Results available
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 12, 2020 · Synced May 21, 2026, 10:50 PM EDT
Active, not recruiting Phase 2 Interventional
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 19, 2025 · Synced May 21, 2026, 10:50 PM EDT
Recruiting No phase listed Observational
View directory record Official record
Conditions
Cystic Fibrosis in Children, Cystic Fibrosis, Chronic Rhinosinusitis (Diagnosis), Olfactory Disorder, Olfactory Impairment
Interventions
Ivacaftor or elexacaftor/tezacaftor/ivacaftor
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
2 Years to 8 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
6
States / cities
Aurora, Colorado • Iowa City, Iowa • Kansas City, Kansas + 3 more
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced May 21, 2026, 10:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
COVID-19 Lower Respiratory Infection, SARS-CoV2 Infection
Interventions
Osteopathic Manipulative Therapy
Other
Lead sponsor
Ohio University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Dublin, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 8, 2021 · Synced May 21, 2026, 10:50 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Alzheimer Disease, Traumatic Brain Injury, Amyotrophic Lateral Sclerosis, Frontotemporal Dementia, Lewy Body Disease, Mild Cognitive Impairment
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
201 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 23, 2021 · Synced May 21, 2026, 10:50 PM EDT
Completed Phase 1 Interventional
View directory record Official record
Conditions
Adult Anaplastic Astrocytoma, Adult Anaplastic Ependymoma, Adult Anaplastic Oligodendroglioma, Adult Brain Stem Glioma, Adult Diffuse Astrocytoma, Adult Ependymoblastoma, Adult Giant Cell Glioblastoma, Adult Glioblastoma, Adult Gliosarcoma, Adult Mixed Glioma, Adult Myxopapillary Ependymoma, Adult Oligodendroglioma, Adult Pilocytic Astrocytoma, Adult Primary Hepatocellular Carcinoma, Adult Subependymoma, Advanced Adult Primary Liver Cancer, Advanced Malignant Mesothelioma, Male Breast Cancer, Recurrent Adenoid Cystic Carcinoma of the Oral Cavity, Recurrent Adult Brain Tumor, Recurrent Adult Primary Liver Cancer, Recurrent Anal Cancer, Recurrent Basal Cell Carcinoma of the Lip, Recurrent Bladder Cancer, Recurrent Breast Cancer, Recurrent Cervical Cancer, Recurrent Colon Cancer, Recurrent Esophageal Cancer, Recurrent Esthesioneuroblastoma of the Paranasal Sinus and Nasal Cavity, Recurrent Inverted Papilloma of the Paranasal Sinus and Nasal Cavity, Recurrent Lymphoepithelioma of the Nasopharynx, Recurrent Lymphoepithelioma of the Oropharynx, Recurrent Malignant Mesothelioma, Recurrent Metastatic Squamous Neck Cancer With Occult Primary, Recurrent Midline Lethal Granuloma of the Paranasal Sinus and Nasal Cavity, Recurrent Mucoepidermoid Carcinoma of the Oral Cavity, Recurrent Non-small Cell Lung Cancer, Recurrent Ovarian Epithelial Cancer, Recurrent Pancreatic Cancer, Recurrent Prostate Cancer, Recurrent Rectal Cancer, Recurrent Salivary Gland Cancer, Recurrent Squamous Cell Carcinoma of the Hypopharynx, Recurrent Squamous Cell Carcinoma of the Larynx, Recurrent Squamous Cell Carcinoma of the Lip and Oral Cavity, Recurrent Squamous Cell Carcinoma of the Nasopharynx, Recurrent Squamous Cell Carcinoma of the Oropharynx, Recurrent Squamous Cell Carcinoma of the Paranasal Sinus and Nasal Cavity, Recurrent Verrucous Carcinoma of the Larynx, Recurrent Verrucous Carcinoma of the Oral Cavity, Stage II Esophageal Cancer, Stage II Pancreatic Cancer, Stage III Esophageal Cancer, Stage III Pancreatic Cancer, Stage IIIB Non-small Cell Lung Cancer, Stage IV Adenoid Cystic Carcinoma of the Oral Cavity, Stage IV Anal Cancer, Stage IV Basal Cell Carcinoma of the Lip, Stage IV Bladder Cancer, Stage IV Breast Cancer, Stage IV Colon Cancer, Stage IV Esophageal Cancer, Stage IV Esthesioneuroblastoma of the Paranasal Sinus and Nasal Cavity, Stage IV Inverted Papilloma of the Paranasal Sinus and Nasal Cavity, Stage IV Lymphoepithelioma of the Nasopharynx, Stage IV Lymphoepithelioma of the Oropharynx, Stage IV Midline Lethal Granuloma of the Paranasal Sinus and Nasal Cavity, Stage IV Mucoepidermoid Carcinoma of the Oral Cavity, Stage IV Non-small Cell Lung Cancer, Stage IV Ovarian Epithelial Cancer, Stage IV Pancreatic Cancer, Stage IV Prostate Cancer, Stage IV Rectal Cancer, Stage IV Salivary Gland Cancer, Stage IV Squamous Cell Carcinoma of the Hypopharynx, Stage IV Squamous Cell Carcinoma of the Larynx, Stage IV Squamous Cell Carcinoma of the Lip and Oral Cavity, Stage IV Squamous Cell Carcinoma of the Nasopharynx, Stage IV Squamous Cell Carcinoma of the Oropharynx, Stage IV Squamous Cell Carcinoma of the Paranasal Sinus and Nasal Cavity, Stage IV Verrucous Carcinoma of the Larynx, Stage IV Verrucous Carcinoma of the Oral Cavity, Stage IVA Cervical Cancer, Stage IVB Cervical Cancer, Unspecified Adult Solid Tumor, Protocol Specific, Untreated Metastatic Squamous Neck Cancer With Occult Primary
Interventions
erlotinib hydrochloride, laboratory biomarker analysis
Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2001
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 15, 2013 · Synced May 21, 2026, 10:50 PM EDT
Recruiting Not applicable Interventional
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 – 2028
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 23, 2025 · Synced May 21, 2026, 10:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 11, 2013 · Synced May 21, 2026, 10:50 PM EDT
Completed Phase 1 Interventional
View directory record Official record
Conditions
Breast Cancer, Head and Neck Cancer, Lung Cancer, Ovarian Cancer, Unspecified Adult Solid Tumor, Protocol Specific
Interventions
docetaxel
Drug
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1996
U.S. locations
3
States / cities
Duarte, California • Los Angeles, California • Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jan 12, 2010 · Synced May 21, 2026, 10:50 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Sellar/Parasellar Tumor, Smell Dysfunction
Interventions
Omega-3
Dietary Supplement
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
2
States / cities
Stanford, California • Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 20, 2018 · Synced May 21, 2026, 10:50 PM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Sinusitis
Interventions
Not listed
Lead sponsor
Greg Davis
Other
Eligibility
18 Years and older
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Dec 10, 2014 · Synced May 21, 2026, 10:50 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Post COVID-19, Cognitive Dysfunction
Interventions
Parasym Device (of Parasym Ltd, UK) using Transcutaneous Vagus Nerve Stimulation (t-VNS)
Device
Lead sponsor
Casa Colina Hospital and Centers for Healthcare
Other
Eligibility
18 Years to 85 Years · Female only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Pomona, California
Source: ClinicalTrials.gov public record
Updated Jul 6, 2023 · Synced May 21, 2026, 10:50 PM EDT
Completed Phase 1Phase 2 Interventional Results available
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 11, 2026 · Synced May 21, 2026, 10:50 PM EDT
Completed Phase 3 Interventional
View directory record Official record
Conditions
Head and Neck Cancer, Pain
Interventions
acupuncture therapy, standard follow-up care
Procedure
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
Not listed
Enrollment
73 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 6, 2013 · Synced May 21, 2026, 10:50 PM EDT
Recruiting Not applicable Interventional
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 Mar 18, 2026 · Synced May 21, 2026, 10:50 PM EDT
Completed Not applicable Interventional Results available
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 11, 2024 · Synced May 21, 2026, 10:50 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Subjective Cognitive Concerns, Mild Cognitive Impairment, Mild Behavioral Impairment, Healthy Aging
Interventions
AROMHA Brain Health Test
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 100 Years
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced May 21, 2026, 10:50 PM EDT
Not yet recruiting Phase 2 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Olfactory Dysfunction, Wellbeing
Interventions
Patient-centered information and education
Behavioral
Lead sponsor
Monell Chemical Senses Center
Other
Eligibility
7 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 29, 2025 · Synced May 21, 2026, 10:50 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Seasonal Allergic Rhinitis
Interventions
Mometasone, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 59 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 27, 2014 · Synced May 21, 2026, 10:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Anosmia, Skull Base Neoplasms
Interventions
Olfactory training, Placebo training
Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced May 21, 2026, 10:50 PM EDT