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I've been diagnosed as bipolar, and several other diagnosis depending on whatever was the shrink's pet specialty at the time I was seeing him/her. I don't deny that my brain chemistry is a tad out of whack and I need meds, maybe even every day of my life. However, psychiatric meds can cause symptoms that mimic the disease they are supposed to treat, and withdrawal symptoms can be hell.
Even psychiatrists will downplay withdrawal symptoms or be ignorant of certain ones. It's hard to go into detail if you're only seeing patients for ten minutes at a time. I agree that you shouldn't stage an intervention for your mother alone.
Commitment laws vary. You might want to seek legal advice, too, if you can.