The legal requirements for buying Benadryl (diphenhydramine) depend heavily on the specific you are purchasing and the country or state where you live.
Cold-Allergy Medication Restrictions - Office of Drug Control Policy do you have to be 18 to buy benadryl
Most states do not have a universal law requiring you to be 18 to buy standard Benadryl. However, if the product contains pseudoephedrine (like Benadryl Allergy Plus Congestion), federal law requires a photo ID and typically restricts sales to those 18 and older. do you have to be 18 to buy benadryl
While it is generally available over-the-counter, health organizations have recently proposed moving it "behind the counter" (where you must ask a pharmacist) to curb misuse. Why You Might Be Carded do you have to be 18 to buy benadryl