Thank you so much for your reply!
I was having the same problems as you it seems! I too was having large output of liquids but my surgeon just told me to bump up my liquid intake to compensate. (I drank water and powerade mostly... and did fine!)
So, I did end up drinking the mag citrate after calling the surgeon's office numerous times crying and crying making sure I was doing the right thing. A nurse called me back that day to let me know NOT to take the Dulcolax! I was right about that. Dulcolax is for people with colons and um, yeah, I don't have one anymore! So, anyway, everything went great with the prep and the surgery. I did end up having to go back into the hospital the day after I was discharged because of an unfortunate ileus (a functional problem) and had to have a NG tube placed down my nose and throat for 5 days. After all of that, I am doing well, but slow to get my appetite back up to speed. I'm certainly trying!
I hope you are doing well! Again, thank you for your reply. It's great to know others are out there that know what I'm going through and that I'm not alone!