What must a physician ensure when prescribing controlled substances for intractable pain?

A physician prescribing controlled substances for intractable pain is required to keep accurate records of treatment. This key responsibility includes documenting the patient's pain management plan, the types, dosages, and quantities of controlled substances prescribed, the patient's response to the treatment, and any follow-up assessments. Maintaining thorough records is crucial for several reasons, including ensuring continuity of care, monitoring for potential misuse or abuse of medication, and fulfilling legal requirements related to prescribing controlled substances. Accurate record-keeping also helps protect both the physician and the patient, as it creates a transparent history of treatment decisions and patient progress.

While the other options involve important aspects of patient care, they do not fulfill the legal and ethical obligations as directly associated with a physician's responsibility when prescribing controlled substances.