 Oklahoma does not have any documented regulation pertaining to the purchase of dextromethorphan available at this time.Oregon Senate Bill 743 states that a provider is prohibited to provide a dextromethorphan containing product to a person under the age of 18 and an individual under the age of 18 is prohibited to purchase a dextromethorphan containing product.The provider is required to obtain identification for proof of age unless the provider can reasonable presume, based on the purchaser's appearance, that the purchaser is 25 years of age or older.