Really? Didn't know that, have that to look forward to over the Christmas.
Assuming that you're on prednisone or some other generic equivalent, the going on them there's no getting away from, I always feel wired and high but in a really shit, edgy way for the first couple of days, and then my body gets used to them. If you're on a reducing dose you'll probably wean yourself off them ok but if you've been prescribed the same amount each day and then none there's a chance you'll feel their absence for a coupe of days too.
That's just me though, hopefully you wont get the side effects.