What can I do if my mother is addicted to pain medication?

Find Adictionologist. There are no reputable studies that show benefit from the long term use of opioids. There are several paths to weaning, and the choice somewhat depends on the reasons for your mother being on the meds in the first place. You may need to find her an alternative means of pain support, without popping pills. Speak to her pcp to find a solution - and tell the pcp your addiction concerns.