The Human Medicines Regulations 2012 provides
a range of exemptions to the restrictions on the
sale, supply and administration of medicines.
A number of these exemptions are collectively
described as patient specific directions (PSDs).
Legislation does not specifically define a PSD.
However, it is generally accepted to mean
a written instruction from a doctor, dentist or
non-medical prescriber for a medicine
to be supplied or administered to a named patient
after the prescriber has assessed that patient
on an individual basis.