Does the 6 month limit for refills on schedule III-V medication mean a 6 month quantity limit?
No, the prescription is valid for 6 months from the date it is written and can have up to 5 refills. After 6 months the script is no longer valid and any unused refills are void. The rules do not apply to quantity dispensed. (It is legal to dispense a prescribed quantity that exceeds a 6 month supply).