Mr. Peter Collins:

The distinction is that non-dispensed medicines need to be up on the system immediately to allow people to be able to dispense them, but if they are dispensed, there is no immediate need for them to be up on the system. The dispenser is not going to be able to dispense because it has already gone but if the vet has not dispensed that medicine - he or she has written the prescription and is the only person who could write it - he or she needs to upload it to the system immediately.