To me, and again, my opinion only. The brain
fog comes from the medications taken for
fibro. A lot of people use 2-3 different things for certain symptoms, to me (my opinion only), that would be a cause for the "brain fog" so many complain about.
I take only OTC, (everyone is different) aleve & tylenol for my aches. It works for me.
Have you thought about CBT for your insomnia? Cognitive Behavioral Thearpy.