It is sold over the counter in most US pharmacies under the Vicks inhaler brand. The active ingredient label conveniently uses a spelling that most people will

It is sold over the counter in most US pharmacies under the Vicks inhaler brand. The active ingredient label conveniently uses a spelling that most people will not recognize which is probably effective in preventing alarm from customers who aren't familiar with the dramatic difference in the effects of the two enantiomers.