I was on Prednisone a couple years ago and it gave me severe inso...

I was on Prednisone a couple years ago and it gave me severe insomnia, I ended up tapering as quickly as possible, I was so wired I couldn't function. My son was started on it today, and I was a bit worried about letting him take it, he has asthma and is in the middle of a flare up that started 5 days ago and isn't getting much better. So we started the Prednisone tonight, and within an hour he almost had an accident with diarrhea which is not like him at all, he is a 30 minute on the toilet taking his time kind of boy. Now I'm worried it's going to be a long night, and worry that tomorrow nights dose will be worse?