6. Have vital signs as follows: resting pulse between 50 and 90 bpm, blood pressures between 105-150mm Hg systolic and 45-90mm Hg diastolic. Note: MA Abusing participants may present with elevated vital signs during the intake screening phase as a result of MA intoxication or anxiety and elevated vital signs may occur after inclusion to the study prior to administration or Methamphetamine or study compound. Participants must have vital signs within the aforementioned range on two timepoints (i.e., morning or night vital collection) during two consecutive days prior to randomization or participation will be terminated.