Department of Defense PTSD Adaptive Platform Trial - Intervention D - SLS-002

A Phase 2, Multi-center, Multi-arm, Randomized, Placebo-controlled, Double-blind, Adaptive Platform Study to Evaluate the Safety, Tolerability, and Efficacy of Potential Pharmacotherapeutic Interventions in Active-Duty Service Members, Veterans, and Non-Veteran Civilians With PTSD

This is a Phase 2 randomized, double-blinded, placebo-controlled study that will evaluate multiple potential pharmacotherapeutic interventions for Post Traumatic Stress Disorder (PTSD) utilizing an adaptive platform trial (APT) design.

Intervention D - SLS-002 will assess the safety and efficacy of SLS-002 in participants with PTSD.

Please see NCT05422612 for information on the S-21-02 Master Protocol.

Study Overview

• Status: Suspended
• Conditions: Post Traumatic Stress Disorder
• Intervention / Treatment: Drug: Intervention D SLS-002; Drug: Intervention D Placebo

Detailed Description

The general structure of this Adaptive Platform Trial (APT) consists of a 30-day Screening Period, a 12-week Platform Treatment Period, and a 4-week Safety Follow-up. The S-21-02 Platform Trial will evaluate the safety and efficacy of multiple investigational products for the treatment of PTSD (see NCT05422612 for Master Protocol information). Participants are randomized among the multiple cohorts in the study and the resulting randomization enables sharing/pooling of control subjects, where all interventions may be compared to a common control (placebo). This record only includes information relevant to the SLS-002 cohort.

Once a participant meets all eligibility criteria for the Master Protocol, eligibility for each currently enrolling intervention cohort is assessed. Eligible participants will be randomized with equal probability into a cohort. Participants randomized to the SLS-002 cohort are then randomly assigned to receive either SLS-002 or placebo (in a ratio of 5:3; intervention:placebo), for the duration of the 12-week treatment period.

Parties interested in having their intervention considered for testing within the Military and Veterans PTSD Adaptive Platform Clinical Trial (M-PACT) should complete a request for information form using this webpage https://citeline.qualtrics.com/jfe/form/SV_8eTQKw6TNug4z42.

• Study Type: Interventional
• Enrollment (Estimated): 200
• Phase: Phase 2

Contacts and Locations

Study Locations

• United States
  • Florida
    • Miami, Florida, United States, 33032
      • Homestead Associates in Research, Inc.
  • Georgia
    • Atlanta, Georgia, United States, 30318
      • Advanced Discovery Research
  • Hawaii
    • Tripler AMC, Hawaii, United States, 96859
      • Tripler Army Medical Center (TAMC)
  • Kentucky
    • Fort Thomas, Kentucky, United States, 41075
      • Cincinnati Veteran's Affairs Medical Center
  • Maryland
    • Bethesda, Maryland, United States, 20889-5632
      • Walter Reed National Military Medical Center (WRNMC)
  • New York
    • Williamsville, New York, United States, 14221
      • Upstate Clinical Research Associates, LLC
  • Texas
    • San Antonio, Texas, United States, 78236
      • Wilford Hall Ambulatory Surgical Center (WHASC)
  • Virginia
    • Fort Belvoir, Virginia, United States, 22060-5285
      • Alexander T. Augusta Military Medical Center (ATAMMC):
  • Washington
    • Joint Base Lewis McChord, Washington, United States, 98433
      • Madigan Army Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

The following inclusion criteria are in addition to the exclusion criteria specified in the Master Protocol (NCT05422612).

1. Is able to complete intranasal administration of study intervention.
2. Is able to refrain from alcohol or cannabis consumption/use on dosing days.
3. Is willing and able to attend dosing visits as outlined in the protocol (twice a week for the first 8 week and then once a week for Weeks 9 through 12) and agrees not to drive a car or operate machinery for 24 hours after receiving the study intervention.

Exclusion Criteria:

The following exclusion criteria are in addition to the exclusion criteria specified in the Master Protocol (NCT05422612).

1. Has a history of seizures (other than childhood febrile seizures).
2. Has a body mass index >40 or <18 kg/m2 at Screening.
3. Has known, uncontrolled hypertension or blood pressure that, in the investigator's judgment, should exclude the subject at Screening or Baseline (blood pressure may be repeated as per the site's standard operating procedures).
4. Has a known history or current finding of cardiovascular disease, cerebrovascular disease, advanced arteriosclerosis, structural cardiac abnormality, cardiomyopathy, serious heart rhythm abnormalities, coronary artery disease, congenital heart disease, ischemic heart disease, cardiac insufficiency, supraventricular, ventricular heart rhythm disorder, prolonged QT syndrome (ie, QTcF >450 msec for males and >470 msec for females) or associated risk factors (ie, hypokalemia, family history of long QT syndrome), syncope, cardiac conduction problems (eg, clinically significant heart block), exercise-related cardiac events including syncope and pre-syncope, clinically significant bradycardia, or other serious cardiac problems.
5. Has a concurrent chronic or acute illness, or other condition (eg, narcolepsy, uncontrolled hyper- or hypothyroidism) that might confound the results of safety assessments conducted in the study.
6. Has any medical condition that could interfere with the absorption of intranasal ketamine (eg, nasal polyps, clinically significant deviated septum [corrected or persistent], or other physical abnormalities of the nose).
7. Has a history of interstitial or ulcerative cystitis, overactive bladder, painful bladder

8. syndrome, chronic pelvic pain, frequent recurrent urinary tract infections, autoimmune disease, active urinary tract infection, history of prostate cancer, bladder cancer or bladder

   a. surgery, or symptoms suggestive of these disorders (eg, high urinary frequency, persistent urge to urinate).

9. Has any history of using ketamine or esketamine. Note previous use of ketamine for anesthesia is allowed.
10. Has known or suspected intolerance or hypersensitivity to the study intervention(s), closely related compounds, or any ingredients.
11. Does not meet or is not willing to comply with the requirements listed in protocol related to prohibited and restricted medications and therapies, as well as required washout periods prior to participation. Prohibited medications and therapies include, but are not limited to, monoamine oxidase inhibitors (MAOIs), chronic/frequent use of opioids or drugs with activity at the opioid receptor, psychostimulants, mood stabilizers/anticonvulsants, antipsychotics, or any medication/therapy that might confound the results of safety assessments conducted in the study. Subjects who have received any of these prohibited medications within 30 days of Screening are excluded from the study. Potent CYP 3A4 inhibitors, including nefazodone and fluvoxamine, are not permitted within 1 week of first dose and until at least 1 day after the last dose. Potent CYP 3A4 inducers, including a. St. John's wort, are not permitted within 30 days of first dose and until at least 1 day after the last dose.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Intervention D: SLS-002	Drug: Intervention D SLS-002; SLS-002 will be administered via intranasal administration (one spray per nostril, per device) at 78 mg two times per week for the first eight weeks and then once a week for the last four weeks.; Other Names: Ketamine
Placebo Comparator: Intervention D: Placebo	Drug: Intervention D Placebo; A matching placebo will be administered via intranasal administration (one spray per nostril, per device) two times per week for the first eight weeks and then once a week for the last four weeks.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Incidence of new or worsening suicidal thoughts or behaviors as measured by change in Columbia Suicide Severity Rating Scale (C-SSRS) score from baseline.	The C-SSRS is an assessment of suicidal ideation and behavior in clinical and research settings. The C-SSRS consists of 16 questions that ask about suicidal ideation and behaviors (the first 10 questions comprise the ideation subscale and the last 6 comprise the behavior subscale). This 5-item subscale ranges from a minimum of 0 (corresponding to no suicidal ideation) to a maximum of 5 (representing active suicidal ideation with plan and intent).	12 Weeks
Absolute change in the Clinician-Administered PTSD Scale-5-Revised (CAPS-5-R) Past Month total score at Week 12 (Final/Early termination Visit).	A change in PTSD symptom severity from baseline as measured by CAPS-5-R Past Month. The range of the scale is 0-200. The higher the score at baseline, the worse the PTSD severity. The larger the decrease in score from baseline, the better the outcome.	12 Weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Frequency of treatment-emergent adverse events (TEAEs).	The TEAEs recorded during the study will be summarized by system organ class, preferred term, and treatment group. Adverse events and medical history will be coded using the most current version of MedDRA.	12 Weeks
Severity of treatment-emergent adverse events (TEAEs).	The TEAEs recorded during the study will be summarized by system organ class, preferred term, and treatment group. Adverse events and medical history will be coded using the most current version of MedDRA.	12 Weeks
Frequency of serious adverse events (SAEs)	The SAEs recorded during the study will be summarized by system organ class, preferred term, and treatment group. Adverse events and medical history will be coded using the most current version of MedDRA	12 Weeks
Severity of serious adverse events (SAEs).	The SAEs recorded during the study will be summarized by system organ class, preferred term, and treatment group. Adverse events and medical history will be coded using the most current version of MedDRA	12 Weeks
Number of participants with a Response Rate ≥30%	≥30% reduction from Baseline to 12 Weeks in the Clinician-Administered PTSD Scale for DSM-5 Revised (CAPS-5-R), Past Month total score. The range of the scale is 0-200. The higher the score, the worse the PTSD severity. The larger the decrease in score from baseline, the better the outcome.	12 Weeks
Number of participants with a Response Rate ≥50%	≥50% reduction from Baseline to 12 Weeks in the Clinician-Administered PTSD Scale for DSM-5 Revised (CAPS-5-R), Past Month total score. The range of the scale is 0-200. The higher the score, the worse the PTSD severity. The larger the decrease in score from baseline, the better the outcome.	12 Weeks
Number of participants Achieving Remission.	Achieving remission: defined as the Clinician-Administered PTSD Scale for DSM-5 Revised (CAPS-5-R), Past Month total score <18. The range of the scale is 0-200. The higher the score, the worse the PTSD severity.	12 Weeks
Relative change from Baseline to Week 12 in CAPS-5-R, Past Month total score.	A relative change in PTSD symptom severity from baseline as measured by the Clinician-Administered PTSD Scale for DSM-5 Revised (CAPS-5-R) Past Month. The range of the scale is 0-200. The higher the score at baseline, the worse the PTSD severity. The larger the decrease in score from baseline, the better the outcome.	12 Weeks

Collaborators and Investigators

• Sponsor: Global Coalition for Adaptive Research
• Collaborators: Idorsia Pharmaceuticals Ltd.; U.S. Army Medical Research and Development Command; Berry Consultants; Cambridge Cognition Ltd; Citeline; PPD Development, LP

Publications and helpful links

General Publications

• Viele K. Allocation in platform trials to maintain comparability across time and eligibility. Stat Med. 2023 Jul 20;42(16):2811-2818. doi: 10.1002/sim.9750. Epub 2023 Apr 23.

Study record dates

Study Major Dates

• Study Start (Estimated): May 1, 2028
• Primary Completion (Estimated): May 1, 2029
• Study Completion (Estimated): July 1, 2029

Study Registration Dates

• First Submitted: February 4, 2025
• First Submitted That Met QC Criteria: February 4, 2025
• First Posted (Actual): February 10, 2025

Study Record Updates

• Last Update Posted (Actual): May 20, 2026
• Last Update Submitted That Met QC Criteria: May 18, 2026
• Last Verified: May 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Trauma and Stressor Related Disorders; Mental Disorders; Stress Disorders, Traumatic; Stress Disorders, Post-Traumatic; Organic Chemicals; Hydrocarbons; Cyclohexanes; Cycloparaffins; Hydrocarbons, Alicyclic; Hydrocarbons, Cyclic; Ketamine
• Other Study ID Numbers: S-21-02 (SLS-002)

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No