https://canadiancentreforaddictions.org/can-you-force-someone-into-rehab/

CCFA

The pain of watching a loved one struggle with substance abuse or addiction can leave anyone frustrated and drained of all energy. Eventually, a breaking point is reached and the question is asked, “Can my loved one be forcefully admitted into rehabilitation”?

The short answer is no. The longer and more detailed answer is, it depends.

Mental Health Act