I have read this on several websites and it states it also in Wikipedia. I am confused because this medicine has codeine in it, yet it says u can buy 4 ounces at the pharmacy if u are over 18? It reads like this:Robitussin DAC (more commonly known as its generic form, Cheratussin DAC) is an exempt narcotic cold medicine, which is available in the United States in a solution. A version without pseudoephedrine is called Robitussin AC. Cherastussin DAC and AC are manufactured by Qualitest. Under U.S. federal law, up to four ounces can be purchased within a 48 hour period without prescription, provided the purchaser is at least 18 years of age, sign a log book, and provide identification if not known to the ..

Is this true??? Just wondering