Hi Michelle,
Its only been licenced in the UK for 10 months and, as yet, is not widely known amongst the GPs. It is mostly prescribed by consultants. Cost to the NHS is £68 per pen (a pen lasts for 30 days so one pen equates to a month's treatment). On private prescription it costs around £92 to £105 per pen. You could suggest it to your GP, but GPs generally don't like to prescribe something they are not familiar with. Obviously you will need to be very careful how you approach your GP about it - they don't like to be told by a patient what they should be prescribing - any more than you would appreciate a GP telling you how to do your job. If your GP won't play ball you could always ask if you could be referred to a consultant (an NHS one unless you have private health cover).