What is NOT included in a prescription for legal and safety reasons?

In a prescription, the inclusion of a DEA number is not mandated for all prescriptions, which is likely why it's considered the correct choice in this context. The Drug Enforcement Administration (DEA) number is specifically required for controlled substances, allowing for the tracking of prescription medications that have a potential for abuse. However, for non-controlled substances, the DEA number is not legally required on the prescription.

On the other hand, the name and license number of the nurse practitioner, the clinic's name and address, and the patient's information are all essential components of a legal prescription. These elements ensure accountability, provide a verifiable source for the prescription, and promote patient safety. Including the NP's name and license number verifies that the prescribing individual is authorized to write prescriptions, while the clinic's information provides a point of contact for any necessary follow-up. Patient information is crucial for accurately identifying who the prescription is for and ensuring that the correct medications are provided. Thus, the absence of a DEA number is what distinguishes it as a component that may not necessarily be included in every prescription.