Ireland
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Recruiting Phase 2

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

NCT06721494 · tracked via the Priya Life Science USA tracker
Sponsor
Clear Scientific, Inc
Phase
Phase 2
Started
2026-02-05
Last updated
2026-10-21

Condition(s) studied

Methamphetamine IntoxicationMethamphetamine DisordersMethamphetamine Abuse

Investigational drug(s) / intervention(s)

MethamphetamineSterile SalineCS-1103 →

Methamphetamine: Methamphetamine HCl for intravenous administration

Sterile Saline: Sterile Saline for intravenous administration

CS-1103: CS-1103 for intravenous administration

Study 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).

Eligibility

Sex
ALL
Min age
18 Years
Max age
55 Years
Healthy volunteers
No
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 56 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.

Primary outcome measure(s)

  • Number of participants with CS-1103-related adverse events (AEs) assessed by physical examinations — 3 days plus follow-up on Day 10
    Physical examinations
  • Number of participants with CS-1103-related adverse events (AEs) assessed by electrocardiograms (ECGs) — 3 days plus follow-up on Day 10
    Digital 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 signs — 3 days plus follow-up on Day 10
    Blood pressure, pulse rate, respiratory rate, oxygen saturation, and body temperature
  • Number of participants with CS-1103-related adverse events (AEs) assessed by laboratory parameters — 3 days plus follow-up on Day 10
    Clinical chemistry, hematology, coagulation, and urinalysis
  • Time course and magnitude of urine excretion of methamphetamine — 48 hours
    Measurement of concentration of methamphetamine in urine

Trial sites (1)

FacilityCityRegionStatus
California Clinical Trials Medical Group Glendale California Recruiting
Official registry record

This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.

View NCT06721494 on ClinicalTrials.gov ↗ ← All trials in the USA