Final answer:
The maximum number of refills allowed for schedules C-III and C-IV prescriptions is 5 within a 6-month period.
Step-by-step explanation:
The maximum number of refills allowed for schedules C-III and C-IV prescriptions is determined by federal law in the United States. For schedule C-III prescriptions, a maximum of 5 refills are allowed within a 6-month period. After the 6-month period expires, a new prescription must be obtained from the prescriber. For schedule C-IV prescriptions, a maximum of 5 refills are allowed within a 6-month period as well. So, both schedule C-III and C-IV prescriptions have the same maximum number of refills allowed.