She came out of it just fine, thanks everyone! She was originally on Vitamax and I've switched pharmacies and they can't get Vitamax so we switched her to the chewable ADEK's. Those were working fine, and then those got to where they were on backorder, so we had to go to the softgel AquADEK's. I guess they reformulated those so well for super fast absorption that the 20 mg of niacin in them was absorbed by her system all at once?
Khristina - thanks for the information. I did give them to her after a meal, but she hadn't eaten much. I just don't think I can try them anymore on her. If she were a little older, maybe. I guess I'll go back to that one pharmacy for Vitamax only.
Jody - this is very interesting about her vitamin levels; I will follow up on that.
Jade - that link was totally on the mark! I am amazed at how much I keep learning!