When do you need your ID for to purchase OTC drugs?

You need your ID to purchase certain OTC drugs such as cough and cold medicines that include pseudoephedrine (PSE). PSE is a drug that treats nasal congestion (clears your nose) but it has been abused by people who use it make crystal meth. As a result, there are limitations in buying the drug including how much per day and month one can buy PSE and that a customer has to provide identification so the stores can document that person.