The pharmacokinetics of the methamphetamine enantiomers are similar, but there are substantial pharmacodynamic differences between the isomers. At high doses, l-methamphetamine intoxication is similar to that of d-methamphetamine, but the psychodynamic effects are shorter-lived and less desired by abusers. Racemic and d-methamphetamine have similar effects and would be expected to have comparable abuse liabilities.
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