 The provider must check the identification of a person wishing to purchase dextromethorphan-containing products to verify that the purchaser is 18 years of age or older.There is a stipulation that identification is not required if the provider could reasonably assume that the purchaser is 25 years of age or older based on appearance.A person under 18 years of age may purchase a product containing dextromethorphan if they have a prescription for said product from a licensed practitioner.