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Olfaction Disorders clinical trials

The registry lists 70 studies for Olfaction Disorders across more than 10 countries. 18 are recruiting or about to start. 27 of them are mainly about Olfaction Disorders (how this is decided). Per ClinicalTrials.gov, last updated 2026-10-09. Counting its narrower condition Anosmia too: 213 studies, 56 open.

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Status

Completed
32
Recruiting
14
Status unknown
10
Withdrawn
5
Terminated
3
Not yet recruiting
3

Phase

Phase 2
17
Phase 3
5
Phase 1
3
Phase 4
2

Where

United States
25
France
11
Italy
6
Canada
4
China
3
United Kingdom
3

Who runs them

Washington University School of Medicine (7) · Stanford University (3) · Central Hospital, Nancy, France (2) · Peking University Third Hospital (2) · University of North Carolina, Chapel Hill (2) · Menoufia University (2) · Centre Hospitalier Universitaire de Nice (2) · Medical University of South Carolina (2)

What is being tested here

Drugs under test in Olfaction Disorders studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted

DrugOpenPhase 3All
Gonadotropin-Releasing Hormone111
Budesonide013
Mepivacaine002
Omega-3 fatty acid002
Theophylline002
Sodium Citrate001
Citric Acid001
Isotretinoin001
Insulin011
Donepezil001

Coming up

3phase 3 studies under way
6studies finish main data collection within a year

Studies recruiting or running, from their records. “Main data collection” ends at the primary completion date, the sponsor’s own estimate, which often moves.

All 6

Who these studies take

Of the 14 Olfaction Disorders studies recruiting now, 7 (50%) set no upper age limit and 5 (36%) stop at 75 or younger. 4 (29%) take children under 18. 0 (0%) are for women only and 0 (0%) for men only; 3 (21%) take healthy volunteers.

Recruiting studies that take each age, of 14
AgeWomenMen
102 (14%)2 (14%)
1813 (93%)13 (93%)
3013 (93%)13 (93%)
4013 (93%)13 (93%)
5013 (93%)13 (93%)
6512 (86%)12 (86%)
759 (64%)9 (64%)
858 (57%)8 (57%)

Across all 70 studies, recruiting or not: 40% stop at 75 or younger and 26% at 65; 10% take children; 0% are for women only and 0% for men only; 23% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Olfaction Disorders studies take

Of 20 interventional studies with no phase under Olfaction Disorders, half reached primary completion within 24 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Interventional, no phase24 mo12–43 · 20 studies——

Each figure is the month by which half the studies had reached primary completion, with the range in which the middle half did. Studies still running count until their last registry update; studies that stopped early are left out. Phase 1 includes early phase 1; observational means prospective or not stated, as retrospective and cross-sectional studies date a window of data rather than a study. How these figures are worked out

Studies

Recruiting first, then most recently updated. Showing 50 of 70. Browse all 70 → or search them.