The portion of US states age-restricting sales of dextromethorphan OTC cough medicines isn't yet quite at half. But given the steadily increasing state initiatives, it's likely the total could approach 25 before Congress might act to impose a national law.
Pennsylvania on Oct. 24 became the 17th state to limit sales of dextromethorphan (DXM) OTCs to consumers 18 and older because teenagers' abuse of the ingredient for intoxicating effect remains a common problem