When I changed GP's recently in the same practise, we had a run down on what medication I was taking. I was taking a reduced dose of Xaralto which is a anti coagulant as advised by my cardiologist , and as I have been passing blood dropped back to one tablet every two days. The new GP explained why I should get of it completely to which I finally agreed to, but only if I could get off rosavastatin, which she agreed to.
The painkiller medication which she prescribed at the same time caused a bit of a problem with the pharmacy as it was a complete jump from what my previous GP gave me. There was a one on discussion there as well.
The only time I have been refused a medication is when I run out of repeat scripts.