Morphine

I'm currently on morphine. It's working, the pain's been dulled to a level I can cope with, but I feel really weird. I'm also very tired. I'm a bit worried about what my psychiatrist is going to say though. I see him tomorrow morning, so we'll see. If he can come up with an alternative that works, and doesn't make me feel so crap, I'll take it, but I don't want to stop the morphine unless I know the alternative will be as effective. I'm sick of being in severe pain, with no prospect of it ever getting any better. My big worry is addiction. I will get addicted to morphine if I stay on it longterm, but what can I do? Is it worth it?