Final answer:
Law requires pharmacies to maintain prescription drugs and pharmaceutical supplies, and they may also offer over-the-counter medications. Prescription drugs are subject to FDA regulation and must be dispensed by licensed pharmacists.
Step-by-step explanation:
Pharmacies are required by law to maintain several items to meet regulatory standards and ensure patient safety. Among these, prescription drugs are a critical focus, as they are regulated by the Food and Drug Administration (FDA) for safety and efficacy. Pharmacies must also have licensed pharmacists to dispense these drugs, which can only be sold after receiving FDA approval through a rigorous New Drug Application (NDA) process. Prescription drugs are available only by prescription by default, and a change to over-the-counter (OTC) status requires a separate approval process. Other items a pharmacy must maintain include pharmaceutical supplies related to the dispensing of medication, and they may also carry over-the-counter medications for less severe health issues that don't require a prescription.