Which information is required on a prescription for a controlled substance?

The correct answer includes a comprehensive set of information that is critical for the safe and legal dispensing of controlled substances. When a prescription for a controlled substance is issued, it is essential to have the patient's full name and address to ensure proper identification and to comply with regulatory requirements. The inclusion of the drug name, dosage form, quantity prescribed, and directions for use ensures that the pharmacist can dispense the medication accurately and provide proper counseling to the patient.

Moreover, the prescriber’s signature is a legal requirement that validates the prescription, and the DEA number is crucial as it identifies the prescriber’s authorization to prescribe controlled substances, thereby upholding regulations governed by the Drug Enforcement Administration. This detailed information not only supports patient safety but also aligns with legal standards necessary for handling controlled substances.

The other options do not encompass all the necessary components required for a lawful prescription of a controlled substance. For instance, simply including the patient's age and weight or just minimal information about the patient's name and drug name would not meet legal standards or facilitate appropriate patient care. Similarly, mentioning only the prescriber’s name and medication cost fails to incorporate the essential details needed for dispensing and safety monitoring.