A consumer angrily approached the pharmacist on duty and asked where the pharmacy was hiding the PSE products. The pharmacist politely informed the patient that the pharmacy kept the drug behind the prescription counter in order to comply with the law. The patient then asked for four boxes of 30 tablets each of PSE HCl 30 mg tablets. Explain if the pharmacy can sell the patient this much of the drug. What legal requirements must be met to sell the product?