Starting Sunday, California will become the first state to try to curb the abuse of over-the-counter cold medicines containing a powerful cough suppressant by requiring consumers to show proof they’re over age 18.The ingredient is dextromethorphan, or DXM, and it’s found in popular medications such as Robitussin-DM, Mucinex-DM, Delsym, Coricidin and NyQuil.

Via www.sfgate.com