ClinicalTrials.gg
CompletedNCT06659263Updated Jun 12, 2025

RE104 Clinical Lactation Study

A Phase 1 interventional study of RE104 for Injection in Lactation, sponsored by Reunion Neuroscience Inc. Completed at 1 site in United States. Open to female participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-06-12.

Sponsored by Reunion Neuroscience Inc · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was May 2025, 1 year 5 months ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
14
Allocation
Not applicable
Ages
18 Years to 45 Years
Sex
Female
01

Study summary

The purpose of this study is to obtain data necessary to characterize the elimination of RE104 and metabolites from breastmilk of health lactating volunteers to support a regulatory assessment of when mothers can safely return to breastfeeding following a single-dose of RE104 for Injection.

02

Conditions studied

  • Lactation

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03

In context

Breast Feeding

1,081 studies on the registry are indexed under Breast Feeding; 217 are open to participants now.

This study's enrollment of 14 is below the median of 100 across 844 interventional studies indexed under Breast Feeding.

Browse Breast Feeding studies →

Lead sponsor

Reunion Neuroscience Inc is the lead sponsor of 5 studies on the registry; 2 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Females between 18 and 45 years of age, at least 50 kgs, and a of 18-34 kg/m2
  • Has been breastfeeding or actively pumping for at least 4 weeks postpartum
  • Agrees to cease breastfeeding for duration of study (Day 14) and confirms infant is able to feed from a bottle at screening.
  • Willing and able to pump in order to maintain sufficient milk supply volumes for the study
  • Is not pregnant or planning to become pregnant during the study
  • Able to understand and adhere to study schedule and requirements and willing to sign an ICF
  • In good general health as determined by medical history, clinical laboratory test results, vital sign measurements, 12-lead results, and physical examination findings at screening

Exclusion criteria

Exclusion Criteria:

  • Has mastitis or other condition that would prevent the collection of milk from one or both breasts
  • Active or medical history of significant mental disorder (including but not necessarily limited to major depression and anxiety disorders, bipolar disorder, schizophrenia, schizoaffective disorder, psychotic disorder and/or borderline personality disorder), or first-degree family history of psychosis or bipolar disorder
  • Medically significant condition or other concomitant condition or history rendering unsuitability for the study, in the judgement of the investigator
  • Has used or intends to use of prohibited medications
  • Has a known sensitivity or intolerance to hallucinogenic or psychedelic substances, or potential rescue medications
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

ECG (electrocardiogram)

A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
14 participants (actual)

Study arms

  • Experimental
    30 mg RE104

    A single subcutaneous injection of 30 mg RE104 for Injection

    Drug: RE104 for Injection

Interventions

06

What researchers measure

Primary outcomes

  1. Area under the concentration-time curve from time zero to 24 hours post-dose (AUC0 24) for RE104 and 4-OH-DiPT in plasma and breast milk

    Time frame: Through 24 hours postdose

  2. Area under the concentration-time curve from time zero to the time of the last quantifiable concentration (AUClast) for RE104 and 4-OH-DiPT in plasma and breast milk

    Time frame: Through 168 hours postdose

  3. Maximum observed concentration (Cmax) for RE104 and 4-OH-DiPT in plasma and breast milk

    Time frame: Through 168 hours postdose

  4. Time to reach Cmax (tmax) for RE104 and 4-OH-DiPT in plasma and breast milk

    Time frame: Through 168 hours postdose

  5. Apparent total body clearance (CL/F) for RE104 in plasma

    Time frame: Through 168 hours postdose

  6. Apparent volume of distribution during the terminal phase (Vz/F) for RE104 in plasma

    Time frame: Through 168 hours postdose

  7. Apparent terminal elimination half-life (t1/2) for RE104 and 4-OH-DiPT in plasma

    Time frame: Through 168 hours postdose

  8. Milk to plasma (M/P) ratio for RE104 and 4-OH-DiPT in breast milk

    Time frame: Through 168 hours postdose

  9. Relative infant dose (RID) of RE104 and its active entity 4-OH-DiPT

    Time frame: Through 72 hours postdose

  10. Total RID of RE104 and its active entity 4-OH-DiPT

    Time frame: Through 168 hours postdose

Secondary outcomes

  1. Incidence of treatment-emergent adverse events (TEAEs) by frequency, severity and seriousness.

    A treatment-emergent adverse event (TEAE) is defined as any unfavorable and unintended sign, symptom or disease temporally associated with the use of a study drug.

    Time frame: From dosing through study completion (post-dose follow-up is for 14 days)

  2. Area under the concentration-time curve from time zero to 24 hours post-dose (AUC0 24) for detectable/quantifiable RE104 metabolites in plasma and breast milk

    Time frame: Through 24 hours postdose

  3. Area under the concentration-time curve from time zero to the time of the last quantifiable concentration (AUClast) for detectable/quantifiable RE104 metabolites in plasma and breast milk

    Time frame: Through 168 hours postdose

  4. Maximum observed concentration (Cmax) for detectable/quantifiable RE104 metabolites in plasma and breast milk

    Time frame: Through 168 hours postdose

  5. Time to reach Cmax (tmax) for detectable/quantifiable RE104 metabolites in plasma and breast milk

    Time frame: Through 168 hours postdose

  6. Apparent terminal elimination half-life (t1/2) for detectable/quantifiable RE104 metabolites in plasma

    Time frame: Through 168 hours postdose

  7. Milk to plasma (M/P) ratio for detectable/quantifiable RE104 metabolites in breast milk

    Time frame: Through 168 hours postdose

  8. Amount of RE104 and its active entity 4 OH-DiPT excreted into breast milk (Ae) and amount of drug excreted into breast milk relative to dose (Fe)

    Time frame: Through 168 hours postdose

  9. Unbound and bound plasma concentrations of the RE104 active entity 4-OH-DiPT.

    Time frame: 1, 3 and 8 hours post-dose

07

Study locations

1 site
  • PPD Inc
    Las Vegas, Nevada 89113, United States
08

References and documents

Individual participant data

Plan to share: No — Data sharing will be consistent with the results submission policy of ClinicalTrials.gov.

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 12, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06659263
Lead sponsor
Reunion Neuroscience Inc
Responsible party
Sponsor
First posted
Oct 26, 2024
Start date
Nov 13, 2024
Primary completion
May 28, 2025
Completion
Jun 4, 2025
Last update
Jun 12, 2025

Study contacts

Mark Pollack, Chief Medical Officer
study director · Reunion Neurosciences Inc

Oversight

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

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