How To Treat Pin Worms Leading To Diarrhea In Children?

I found out last night that my daughter had pin worms... totally new to me, my other child never had this before and I had never even heard of it until now.I went to the local pharmacy and got pin x. I gave my daughter and my son (even though he does not have them) a dose earlier this evening. Now my daughter has diarrhea. I went to bed feeling itching. I don t know if it s just in my head because I know that she has them and has slept with me the past 2 nights. Should I go ahead and take pin x as well?