I've been on 30mg of pred since 8th Jan and am hating the insomnia. The enery kicked in really quickly for me. I took the tablets this evening instead of this morning, not on purpose, I went out for the day without my meds. So I hope I sleep tonight. I can identify with overdoing it too, you feel wiped out for a couple of days afterwards. I have the most killer heartburn too, the moonface, bruising, cramping oh and weight gain ( which i didn't need!)