It is probably only for your state or drug store's policies.
Every states have different laws.
Only I have ask for ID if I want buy any OTC medicines contain pseudoephedrine without prescription, it is due to federal law and all OTC contains pseudoephedrine only sit in behind of counter.
Others than that, no ID needed to pick any medicines that listed on prescription paper that where got from doctor office.
Walgreen isn't my pharmacy.
