Maybe the person is just in the wrong situation or just wasn't raised to function well socially and gets depressed because they should. Thanks again for advice. There was heavy drug use in adolescence and occasional 'fits' sort of like temper tantrums.
Drug use is long over now.
I think mostly riding on top of the energy but also with the depression. Sometimes a feeling of euphoria and great sense of well-being comes on out of nowhere. Also music plays in the person's head very frequently almost constantly since early adulthood. Person has been checked for diabetes and thyroid condition. Person has no known bipolar in family but does have immediate blood relations with migraine.