Final answer:
It is false that it is always unlawful to partially fill a CII prescription. There are specific conditions under which partial filling is permitted, but there are strict rules to follow in these cases, such as record keeping and time restrictions.
Step-by-step explanation:
The question asks whether it is unlawful to partially fill a prescription for a Schedule II controlled substance (CII), with the requirement that it must be dispensed in full or returned to the patient. The answer is B) False. Partial filling of CII prescriptions is allowed under certain circumstances according to the Controlled Substances Act and the Drug Enforcement Administration's regulations. For example, partial fills are permitted if the full quantity prescribed cannot be supplied by the pharmacy or if the patient requests a smaller quantity. Additionally, certain provisions allow partial filling for patients in long-term care facilities or patients with a terminal illness. However, there are strict rules and documentation requirements that must be followed when partial filling is conducted.