Study	Reason for exclusion
Chan‐Ob 2001	Excluded as study design were not in the inclusion criteria: not RCT, but a case report.
Cox 2004	Excluded as study design were not in the inclusion criteria: not RCT, but an open label case series report
Gillin 1994	Excluded for the type of participants not in the inclusion criteria: majority of the participants were cocaine dependent.
McGregor 2005	Excluded as the objective and study design were not in the inclusion criteria: not RCT, but an observational study characterizing the natural history of methamphetamine withdrawal.
McGregor 2008a	Excluded as the objective and study design were not in the inclusion criteria: not RCT, used historical comparison group and enrolled subjects sequentially rather than randomly allocated.