Methamphetamine Use Disorder (MUD) is associated with a barrage of mental and physical health problems including heightened drug craving/relapse/overdose rates, comorbid mood and anxiety disorders, and cardiovascular dysfunction. Unfortunately, MUD is becoming more prevalent. In the U.S., methamphetamine-related treatment admissions increased from 15% in 2007 to 26% in 2018 (Jones, Olsen et al., 2020) and 7 out of 1000 individuals reported past-year use from 2015-2018 (Jones, Compton, et al., 2020). Of the individuals reporting past-year use, 53% met criteria for amphetamine use disorder, 27% reported using >200 days, and 22% injected methamphetamine (Jones, Compton, et al., 2020). Despite this substantial burden, there are currently no FDA approved pharmacological treatments for methamphetamine use disorder.~Recent models of addiction highlight the potential role that negative reinforcement plays in relapse, such that stress and negative affect increase drug craving, thereby increasing the likelihood of future drug seeking behaviors despite negative consequences. Consistent with this model, individuals may persist in methamphetamine use to avoid aversive states such as anxiety, depression, fatigue, and other withdrawal symptoms, a cycle known as negative reinforcement. Floatation-REST (Reduced Environmental Stimulation Therapy is a novel non-pharmacologic intervention that has been shown to reduce anxiety/stress in anxious and depressed individuals. It seems plausible that it may have the potential to lessen these aversive states in methamphetamine users, which may also relate to decreased state drug craving/urges to use. To our knowledge, no studies have tested the feasibility/tolerability and safety of floatation-REST in individuals with methamphetamine-type substance use disorder.~The current study investigates the safety and feasibility/tolerability of a single session of floatation-REST in treatment-seeking individuals with methamphetamine use disorder, relative to an active comparator. In this within-subject crossover design, participants will complete two counterbalanced sessions: one in a floatation pool (Pool-REST), and the other in a floatation chair (Chair-REST). Safety and tolerability will be assessed by self-report questionnaires as well as via pre- and post-session ratings of anxiety, stress, and drug craving. Feasibility will be assessed by intervention adherence rate. Findings from this study will inform the design of future feasibility and efficacy studies as well as mechanistic studies of recovery from methamphetamine addiction.
This early-stage trial aims to examine the feasibility, tolerability, and safety of Floatation-REST (Reduced Environmental Stimulation Therapy) or an active comparison condition in 50 individuals receiving treatment for Amphetamine-Type Substance Use Disorder.