Hi Aussie, i am glad to read your PN is going ok, but the throwing out of your back sounds terribly painfull, its really disgusting the amount of time you had to wait in hospital, i had a similar experience waiting with a suspected DVT in the Geelong hospital, it's not right and should be fixed.
I used 300mg Tramadol SR x 2 times a day for a few years and didn't have one problem with it, but it just proves we are not all the same when it comes to taken some meds, i hope your back is feeling better now.

Brian