Hey, I actually just registered this very moment b/c I wanted to reply to you. I've been reading these boards for a few months and these people have the most valuable information, experience and research!
To be completely candid, I have bipolar type 2 and anxiety, with a sprinkling of insomnia on top. I take different meds to help with all these issues, and after extensive research in the form of white papers, speaking with doctors and pharmacists, as well as my own, albeit short, experience (I'm just about 4 weeks post-op) I was only concerned about the bipolar medicine, Depakote Delayed Release 500mg tablets.
I maintained my PRN anti-anxiety and insomnia meds as these are immediate release, and I can report they have worked well for me in the past few weeks since my surgery. I did get switched over to the oral liquid form of the Depakote, however; Valproic Acid Oral Solution 250mg/5ml. I have to take it 3x a day to get the dose I was getting before with the DR tabs, but I had my bloodwork done last week and my serum levels are actually higher than they were on the tabs, so I may be able to come down a bit on the dose after a few months (I want to be sure, as I know I'm still in early recovery and only time will tell.)
I think you are doing the right thing by asking questions. Definitely speak with your surgeon, and prescribing physician as my surgeon didn't really have the first clue about the Bipolar med. Maybe even talk to your pharmacist if you feel comfortable with that. I made sure to have my script filled prior to my surgery date so it would be waiting at home for me after discharge. Good thing too b/c the hospital was out of the liquid form and I would have been out-of-luck.
I'd be happy to talk more if you like. Hope everything goes well for you.