Advice for reducing tablet usage.

My Mother is suffering from Migrane since 25 years(it started during delivery). From 15 years she is taking Migranil tablet as the doctor she consulted then prescribed it. She used to take daily 1 tablet as she used to get the pain daily and since then it's been a habit. If she doesn't take the tablet, she can't even do normal household chores. From the past 3 years, she is taking Migran tablet (2 tablets per day and sometimes even 3 tablets per day depending on the severity) Now, from the past 8 months she is taking Acupuncture treatment and she is responding well to the treatment. As she is addicted to the tablets, we want to know how can we reduce the addiction for the tablets. She can't stop taking the tablets abruptly.