Need info about bipolar disorder medication after Gastric bypass Surgery.?

What if a person with bipolar disorder has the gastric bypass surgery - does anyone know if there is an issue concerning medications and the ability to absorb them after the surgery? Has anyone had this problem? What medications work for people who have had the surgery - which mood stabilizers and what antidepressants work for people who don't absorb much in their stomachs? Person I am worried about is unable to take the same meds as before and is having a terrible time so if anyone can help?
At the hospital they didn't address this concern at all and the counseling they said they provided was nothing more than a poor question and answer waste of time. If you are considering the surgery please get counseling before hand so you are well prepared emotionally for the outcome - it's alot harder to adjust than you realize and you need alot of support whether you have had psychological problems before or not.
THANKS

She already has had the surgery. And YES they will give the surgery to anyone who has the money and will get loans to those who don't have the cash. Their mental eval took like 5 minutes and was worthless. Surgery was scheduled within 3 weeks of first phone call to the "hospital".

They gave a person with a diagnosed mental illness a GB? I thought people had to have a full eval before-and mental illness was a bar to the surgery.

absorption is a problem my sister has that problem now, I would go with the lap band surgery but not the full gastric bypass surgery.
She has Vitamin deficiency, all kinds of problems, Including medications some meds will hit harder and stun you. She took something and 2 min later she passed out.