Final answer:
Schedule III (CIII) to Schedule V (CV) drugs are allowed up to five refills within six months from the date of the prescription, after which a new prescription is needed.
Step-by-step explanation:
The maximum number of refills allowed for Schedule III (CIII) to Schedule V (CV) drugs, as regulated by the Drug Enforcement Administration (DEA), is up to five refills within six months from the date of prescription. After this period, or once the five refills have been used, a new prescription is required. It is essential for both the prescribers and patients to adhere to these regulations to ensure the safe use of controlled substances.