I've been giving my DS, 4.3, this vitamin for about 9 days (as well as his usual multivitamin abidec) and I think it's resulting in increased hyperactivity. He has also seemed a lot more anxious about specific things (dogs) but today he was also on the verge of a tantrum when I took him to get his feet measured for a pair of school shoes. I am so concerned about his change in behaviour I didn't give him his afternoon capsule today 
Has anyone else experienced this with their DC?