> even different isomers can have a noticeable effect for the patient Case in point - L-methamphetamine is or was used in Vicks inhalers in some countries, no

> even different isomers can have a noticeable effect for the patient Case in point - L-methamphetamine is or was used in Vicks inhalers in some countries, notably the US, as it has none of the euphoriant effects of D-methamphetamine but it does still cause vasoconstriction, which can help with a blocked nose!