Controlled Drugs (CDs)
There is a good practice requirement that Schedule 2, 3 or 4 CDs be limited to a quantity for 30 days treatment.
A prescriber may issue prescriptions for a longer period where they believe it to be justified. A dispensing contractor will be reimbursed for any quantity dispensed on an FP10.
Non-controlled Drugs
This decision would be entirely up to the prescriber who may be limited by variables such as the drug they're prescribing, the patient's condition or local restrictions.