Drugs, medicines and other substances that may be ordered only in certain circumstances
3. A drug, medicine or other substance specified in an entry in column 1 of Schedule 2 may not be ordered for a patient in the provision of medical services under a general medical services contract unless –
(a)that patient is a person of a description mentioned in column 2 of that entry; and
(b)that drug, medicine or other substance is prescribed for that patient only for the purpose specified in column 3 of that entry.