HELP!

I'm having surgery tomorrow and they want the bowel cleaned out.  They gave me the Golitely stuff.

When I mixed the stuff I noticed it bubbled up and has carbinated bubbles in it.  Has anyone taken this stuff?  Is it going to hurt me.?  I haven't had a freaking soda in three years and I don't want this stuff to do me in. 

I've tried shaking the bubbles out and leaving the lid open but they are stubborn.

HELP.  Let me know if you had to use it.

 Have not had to use this but i have drank soda without issue..just some slight burps. Good luck!

I drink soda flat,  does not hurt me either.