Again, just to clarify, if you're gonna buy Robitussin in bottle form, make sure you buy Robitussin Maximum Strength Cough. Not Maximum Strength Cough and Cold. Max strength cough and cold has other active ingredients which are potentially harmful in large doses.

Robitussin Max Strength Cough just has DXM as its active ingredient. When buying DXM products, always make sure the product lists dxm as it's only active ingredient.