Hiya I had the same problem in the past. My doctors told me to take it with food. At the time I was not eating at all, just drinking Complan instead. I managed this way-go and get all your pills, half a piece of dry white toast and a drink. Get into bed. Eat the toast, eat the pills, wash them down, here's the important bit-do not move for at least an hour! I found as soon as I tried to get up or walk around I would be going to the ladies and sitting there (you know what I mean), vomiting into a bucket.
I kind of agree with beeswax though. The above worked in terms of keeping the steroids down but I ended up in hospital anyway as I was so ill I needed a higher dose. The maximum dose by mouth is 40mg and after that you need IV steroids. I was admitted and they put me on a drip and IV steroids, nil by mouth, and it worked wonders. The pain disappeared almost overnight. Sadly that was my first hospital stay and the more successful one, but steroids are still helping me, just not as quickly now.