I gave this to my 4 year old daughter and I don't even know where...

I gave this to my 4 year old daughter and I don't even know where to start. My daughter was pretty sluggish the first two days but I thought it was because she did not feel good. She started feeling a little bit better so I stopped the medication. My daughter is a totally different person. She is so hyper I can not settle her down she is jumping off furniture, and I talk to her and it is like she can not hear me. Her eyes are dialated and she acts like she can not stand herself or her skin. My uncle works for the ER and I called him he said that she is having withdraws from the medication. That it is a family to sudifed and everyone responds different. I would be very careful before you give your children or yourself this medication.