The left enantiomer of methamphetamine (exact same chemical formula and structure, just mirror symmetry) is also an OTC decongestant.

Vicks

Only historically. No Vick's brand product has contained it since 2016. The only "brand" name I'm aware of currently is Benzedrex.

Benzedrex is not l-Methamphetamine, it is Propylhexedrine

	▲	nerdsniper 37 minutes ago \| parent [-]
		Ah indeed, I misremembered. That is also a very similar compound, identical structure but more saturated carbon bonds (non-aromatic ring). It's always delightfully silly to get your own correction corrected! https://www.vumc.org/poison-control/toxicology-question-week...