Hi bipolo,
I used to have feelings of grogginess in the morning when I took Benadryl, Tylenol pm or Advil pm. They all have the same active ingredient. Diphenhydramine HCL. The drowsiness can last longer than 8 hours and stay in your system.
If Geodon is stimulating you, you could ask your doc to adjust to taking it in the morning and/or also get a prescribed sleep aid for bedtime. I had to do just that because the Lamictal I'm on is making me super hyper day and night. The only thing that helped me to sleep was a strong concoction of 2 kinds of Benzos I was prescribed (you know, the ones that all end in "pam").
Look into it and see with your doc if you can get a better/non-drowsy sleep aid and/or adjust your geodon take time.
Hope you get to feeling better soon.