I have wondered the same thing about my Mom. I have 2 adult sons who have been diagnosed BP. One takes meds. The other I have no idea. He has not spoken to me in over 15 years now. My guess is NO MEDS. He is on his 3rd marriage and as far as I have known he has never taken his meds. My Mom's mood swings (looking back on it 55 yrs ago, would certainly make you wonder. Maybe NOT KNOWING is better for us?