What do you take to help with the pain?

I'm currently on venlafaxine for the depression n stuff, but I've heard that can help too. But I'm still in quite a bit of pain some days. I've tried stuff for IBS, none of which really helped. So I'm looking to go on a painkiller, I take paracetamol and codiene sometimes, which helps a bit. I will see my GP about it. I just wanted to see what other people took.