Hi Mike,
I had similar issues with splitting the dose. First tried to split it when I was taking 20 mg; one does early morning then the second around 3pm. That did disrupt my sleep (which I already have issues with). Then I went to taking the second does with lunch and that made a big difference. Started at 20mg last October, am now very gradually taper down by 1 mg every 3-4 weeks. If I have a bad day, I take an extra mg with lunch. Also was on methotrexate, which helped get my inflammation markers to normal for the first time in years. However, it made me very lightheaded/dizzy. Am no longer taking it and the lightheadedness is slowly getting better. Hope this helps...it takes time to work thru this. Wishing you the best!