unless there's a type of mucinex I don't know about, stay away. You want DXM and ONLY DXM, in a non-time release pill. Dexalone, Drixalone, The right type of each line of tussins and a handful of other things that are only DXM are the ticket. The easiest was is generic tussin gelcaps. Most pharmacy-type places, including Walgreens, will sell 20 15mg DXM gelcaps in their store brand for about $5.