I think you need to do a bit of googling because this whole affair is receiving a lot of criticism and not necessarily good for the organisation dishing out the fines. http://www.bbc.co.uk/news/health-30622544. I think it is very definitely a case of the punishment not fitting the crime and the shame is even the pharmacist is now expected to police this when all he/she has is your word when you sign the back of the prescription. When that prescription is for something that provides exemption it beggars belief that you then need a certificate. A prison sentence is an option because they don't pay prescription charges and don't have exemption certificates either.