What is required on the label of medications that pharmacists can dispense only by prescription?

The label of medications that can only be dispensed by prescription is required to include the statement "Caution: Federal Law prohibits dispensing without a prescription." This specific wording underscores the legal stipulation that such medications should not be available for purchase without a valid prescription from a licensed healthcare provider. Including this warning serves as a vital reminder of the regulations governing prescription medications, helping to ensure that these drugs are used safely and appropriately under the guidance of a qualified health professional.

Other options might convey similar meanings, but they do not carry the same legal weight or clarity as the required statement. Phrases like "Prescription only," "For prescription use only," and "Rx only," while informative, lack the explicit reminder of the consequences laid out by federal law, which is critical in emphasizing the importance of adhering to these regulations.