Help! Anyone know of foods/meals that will aid in detoxing oxycotin from the body?

My mother has just undergown knee surgery in which she was prescribed oxycotin to manage the post surgery pain. She decided to stop taking the oxycotin, because it made her really sick at her stomach. 

She is now experiencing a number of the nasty withdrawal symtoms listed on various rehab sites. We have a call into her doctor...

In hope,

Dianne