enfamil poly vi sol !?

So my doctor told me that It would be good to give my son this vitumin drop. I would give him This drop and he'd get Really bad , fussy. Crying ALL night and day. Like a Horriable Nightmare. I was wondering if any of you Glow Mommies Have experience like that too? I'm going to stop the drops again and see what happens. Because he was sleeping just fine till I started giving him the drops now he cries all day and night and now I'm starting to cry too. Just asking if your blessings went crazy out of control taking these drops as well and if you stopped and they were back to being better.