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CompletedNCT03934710MESA-EUpdated Nov 29, 2023Results posted

Mood Effects of Serotonin Agonists Extended

A Phase 1 interventional study of Placebo and Serotonin agonist - 13ug in Healthy, sponsored by University of Chicago. Completed at 1 site in United States. Open to participants aged 18 Years to 40 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-11-29.

Sponsored by University of Chicago · Phase 1, Interventional, and Basic science

Phase
Phase 1
Study type
Interventional
Enrollment
56
Allocation
Randomized
Ages
18 Years to 40 Years
Sex
All
01

Study summary

In this study we are examining the effects of repeated very low doses of serotonin agonists on mood individuals with negative mood.

Read the detailed description

Here, we are examining the effects of four repeated low doses of lysergic acid diethylamide (LSD), compared to placebo, administered to healthy adults at 3-4 day intervals, on mood, cognitive performance and responses to emotional tasks

02

Conditions studied

  • Healthy
03

In context

Lead sponsor

University of Chicago is the lead sponsor of 907 studies on the registry; 182 are open to participants now.

Of its 99 completed or terminated interventional studies of FDA-regulated products, 68 (69%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 40 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • English fluency
  • High school level education
  • BMI between 19 and 30

Exclusion criteria

Exclusion Criteria:

  • Diagnosed medical condition
  • women who are nursing, pregnant, or plan to become pregnant within 3 months
  • History of psychotic disorder or family history of psychotic disorder
05

Study design

Phase
Phase 1
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Outcomes assessor)
Enrollment
56 participants (actual)

Study arms

  • Placebo comparator
    Placebo

    Placebo

    Drug: Placebo

  • Experimental
    Serotonin agonist 13ug

    13ug of serotonin agonist

    Drug: Serotonin agonist - 13ug

  • Experimental
    Serotonin agonist 26ug

    26ug of serotonin agonist

    Drug: Serotonin agonist - 26ug

Interventions

  • DrugPlacebo

    Drug will be administered in solution form

  • DrugSerotonin agonist - 13ug

    13ug lysergic acid diethylamide

    Also known as: LSD

  • DrugSerotonin agonist - 26ug

    26ug lysergic acid diethylamide

    Also known as: LSD

06

What researchers measure

Primary outcomes

  1. DASS-21

    The primary outcome measure is the depression anxiety and stress scale (DASS) 21. This self-report measure contains 21 items and the range of scores for depression is 0-42, anxiety 0-42, and stress 0-42. Our primary outcome measure is total depression scale ratings during session 5, with lower scores indicating lower ratings of depression.

    Time frame: End of session 5, approximately 2 weeks from baseline

07

Results

Posted Nov 29, 2023

Participant flow

Participant flow — Overall Study
MilestonePlaceboSerotonin AgonistSerotonin Agonist
Started181919
Completed181919
Not completed000

Outcome measures

PrimaryDASS-21

The primary outcome measure is the depression anxiety and stress scale (DASS) 21. This self-report measure contains 21 items and the range of scores for depression is 0-42, anxiety 0-42, and stress 0-42. Our primary outcome measure is total depression scale ratings during session 5, with lower scores indicating lower ratings of depression.

Time frame:
End of session 5, approximately 2 weeks from baseline
Reported as:
Mean · units on a scale
DASS-21
units on a scalePlaceboSerotonin Agonist 13ugSerotonin Agonist 26ug
DASS-212.9 ± 32.7 ± 2.94.5 ± 3.7

Adverse events

Collected over Through study completion, an average of 2 weeks.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Placebo0/18 (0%)0/18 (0%)0/18 (0%)
Serotonin Agonist 13 ug0/19 (0%)0/19 (0%)0/19 (0%)
Serotonin Agonist 26 ug0/19 (0%)0/19 (0%)0/19 (0%)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)PlaceboSerotonin Agonist 13ugSerotonin Agonist 26 ugTotal
<=18 years0000
Between 18 and 65 years18191956
>=65 years0000
Sex: Female, Male
Sex: Female, Male(Participants)PlaceboSerotonin Agonist 13ugSerotonin Agonist 26 ugTotal
Female76619
Male11131337
Race (NIH/OMB)
Race (NIH/OMB)(Participants)PlaceboSerotonin Agonist 13ugSerotonin Agonist 26 ugTotal
American Indian or Alaska Native0000
Asian1225
Native Hawaiian or Other Pacific Islander0000
Black or African American0213
White12111336
More than one race54312
Unknown or Not Reported0000
Region of Enrollment
Region of Enrollment(participants)PlaceboSerotonin Agonist 13ugSerotonin Agonist 26 ugTotal
United States18191956
Education - High School Education
Education - High School Education(Participants)PlaceboSerotonin Agonist 13ugSerotonin Agonist 26 ugTotal
Count of participants18191956
08

Study locations

1 site
  • Matthew Bona
    Chicago, Illinois 60637, United States
09

References and documents

Study documents

  • Protocol and statistical analysis plan · Feb 20, 2019

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 29, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03934710
Lead sponsor
University of Chicago
Collaborators
National Institute on Drug Abuse (NIDA)
Responsible party
Sponsor
First posted
May 2, 2019
Start date
Apr 20, 2019
Primary completion
Jun 7, 2021
Completion
Jun 7, 2021
Results posted
Nov 29, 2023
Last update
Nov 29, 2023

Study contacts

Harriet de Wit
principal investigator · University of Chicago

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Nov 2023. You cannot join it, but the record below documents what was studied.

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