Contingency Management for Meth in South Africa Methamphetamine Abuse in South Africa

University of California, Los Angeles (UCLA)

Status

Completed

Conditions

Methamphetamine Abuse

Treatments

Behavioral: Contingency Management

Study type

Interventional

Funder types

Other

Identifiers

NCT02907853

R21CMinSA

Details and patient eligibility

About

This study will link findings from neuroscience with clinical outcomes using contingency management (CM) to identify changes in brain structure and function that emerge during purely behavioral therapy for methamphetamine (MA) use.

Full description

This study will correlate MA-abstinence outcomes from an 8-week program of voucher-based incentives using an escalating schedule for 30 treatment-seeking, MA-dependent individuals with scores on tasks of working memory and assessments of neuropsychological and demographic status. At the beginning and end of the CM program, participants will participate in MRI scans while performing a working memory task and will complete a battery of select neurocognitive and psychological assays to address two specific aims: (1) to determine whether changes in neural function within frontostriatal circuitry from baseline to end of the 8-week CM program are associated with parallel changes in measures of cognitive control and impulsivity and with MA abstinence outcomes and (2) to determine whether structural changes in frontostriatal circuitry over the 8-week CM intervention correspond with neurocognitive, psychological and MA abstinence measures.

Enrollment

28 patients

Sex

All

Ages

18 to 45 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

provide voluntary informed consent
meet DSM-5 criteria for MA or amphetamine use disorder
provide at least one urine sample positive for MA/amphetamine metabolites during screening (i.e. prior to the commencement of the study).
aged 18-45
right-handed
English-speaking

Exclusion criteria

currently receiving treatment for stimulant addiction or needing more intensive treatment than outpatient care
meet DSM-5 criteria for substance use disorder other than nicotine
unable to attend 4+ visits during the 2-week screening period or to complete measures
Physical or mental illness that would require intervention that would alter imaging or that would interfere with safe study participation
pregnant, claustrophobic, or have metal prostheses, cardiac pacemakers, or metal clips that are incompatible with the scanner
HIV positive status
unable to comprehend written or spoken English
currently taking psychiatric medication