RecruitingPhase 2Drug trialA Single-Dose Study to Evaluate Safety and Efficacy of CS-1103 in Participants Receiving a Single Dose of MethamphetamineThe 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).