Methamphetamine

This study is being done to understand the metabolism and impairment profile of methamphetamine (meth). Meth exists as two chemical structures that are mirror images of each other: R-meth and S-meth. S-meth is a strong central nervous system stimulant and used to treat attention deficit disorder (ADD). R-meth is not a strong central nervous system stimulant and is available over-the-counter in nasal decongestant sprays.17 healthy participants will be enrolled for 3 study visits and on study for up to 12 weeks.