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A Single-Dose Study to Evaluate Safety and Efficacy of CS-1103 in Participants Receiving a Single Dose of Methamphetamine

A Phase 2 Single-Dose Study to Evaluate Safety and Efficacy of CS-1103 in Participants With Methamphetamine Use Disorder Not Seeking Treatment Receiving a Single Dose of Methamphetamine

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06721494
Enrollment
40
Registered
2024-12-06
Start date
2026-02-05
Completion date
2026-09-11
Last updated
2026-01-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Methamphetamine Intoxication, Methamphetamine Disorders, Methamphetamine Abuse

Brief summary

The purpose of the study is to evaluate the safety, efficacy, and pharmacokinetics of four single, increasing doses of CS-1103, given by intravenous (IV) infusion in otherwise healthy, non-treatment seeking participants with methamphetamine use disorder in the presence of a clinically relevant dose of methamphetamine HCl (30 mg IV).

Interventions

Methamphetamine HCl for intravenous administration

DRUGSterile Saline

Sterile Saline for intravenous administration

CS-1103 for intravenous administration

Sponsors

National Institute on Drug Abuse (NIDA)
CollaboratorNIH
Clear Scientific, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
No

Inclusion criteria

Major Inclusion Criteria: 1. Healthy participants aged 18 to 55 years, inclusive; 2. Meets DSM-5 criteria for methamphetamine use disorder; 3. Not seeking treatment for methamphetamine use disorder; 4. Primary route of methamphetamine self-administration must be intravenous or smoking; 5. Able to abstain from methamphetamine without experiencing severe withdrawal; 6. A body mass index between 18 to 30 kg/m2, inclusive and a minimum body weight of 50 kg; 7. Females must not be lactating and must have a negative pregnancy test during screening and admission. Major

Exclusion criteria

1. Estimated glomerular filtration rate \<60 mL/min/1.73 m2; 2. History of cardiovascular disease; 3. Current moderate to severe use disorder for alcohol, cannabis, cocaine, opioids, or benzodiazepines; 4. History of any clinically important disease or disorder which, in the opinion of the Investigator, may interfere with safe study participation.

Design outcomes

Primary

MeasureTime frameDescription
Number of participants with CS-1103-related adverse events (AEs) assessed by physical examinations3 days plus follow-up on Day 10Physical examinations
Number of participants with CS-1103-related adverse events (AEs) assessed by electrocardiograms (ECGs)3 days plus follow-up on Day 10Digital 12-lead electrocardiograms (ECGs). Any correlation between CS-1103 plasma concentrations and changes in QT intervals will be noted.
Number of participants with CS-1103-related adverse events (AEs) assessed by vital signs3 days plus follow-up on Day 10Blood pressure, pulse rate, respiratory rate, oxygen saturation, and body temperature
Number of participants with CS-1103-related adverse events (AEs) assessed by laboratory parameters3 days plus follow-up on Day 10Clinical chemistry, hematology, coagulation, and urinalysis
Time course and magnitude of urine excretion of methamphetamine48 hoursMeasurement of concentration of methamphetamine in urine

Secondary

MeasureTime frameDescription
Time course of CS-1103 blood and urine concentrations48 hoursMeasurement of plasma and urine concentrations of CS-1103

Countries

United States

Contacts

Primary ContactAnna Del Rosario, B.S.
adelrosario@clearsci.com617-621-8500
Backup ContactPiercen Oliver, Ph.D.
poliver@clearsci.com617-621-8500

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026