Levomethamphetamine[note 1] is the levorotatory (L-enantiomer) form of methamphetamine. Levomethamphetamine is a sympathomimetic vasoconstrictor that is the active ingredient in some over-the-counter (OTC) nasal decongestant inhalers in the United States.[note 2]
2 Side effects
2.1 Non-medicinal usage
3 Detection in body fluids
Levomethamphetamine crosses the blood-brain-barr...