Thanks Kim and zook,

In answer to your question zookester, I haven't got a clue. The callout GP originally gave me the morphine because I was in such pain and throwing up all the time, which was aggravating my back pain and meant I couldn't keep any meds down. I think then the GP at my surgery then decided to continue on oramorph because it was something I'd had before in hospital and tolerated, and was gentler on my stomach than pills, which my system seems to be rejecting more and more...

Once I've had my scan and got some answers, I'll certainly be asking them several questions about my treatment. Then I'll start looking for a new surgery.

Bram.

Addition: I got on the scales this morning, and in these few weeks I've lost a stone in weight. I only wish i could have lost that stone in a longer period without all the grief and pain... Shame such a lot of it is muscle!