I agree it is the steroids in it.

We found with DD that the hunger developed once the steroids started to make a difference, the first few times it was with a couple of days but her last respiratory infection it took 5 days before the steroids made a difference and we knew about it as when she woke in the afternoon she ate for 2 hours straight after not eating for 5 days!

I hope you get over the Bronchitis very soon, bugger for having 9 more days to go