Coming from a long line of Manic Depressives, and being Bipolar II myself I find that weed helps me more then anything. SSRI's (selective serotonin re-uptake inhibitors) helped me a little bit but made me crazy after a while. I stopped taking prescription medications and halted the photochemotherapy treatments I was undergoing (for an unrelated auto immune disease: scleroderma) back in September. I've been smoking everyday, eating healthy, and taking care of myself spiritually and physically and not only has my scleroderma gone into remission but I've had only 1 anxiety attack since (as opposed to the many I would have in the run of a week), and 2 migraines (which would happen often as well), and my mania and depression have levelled out nicely. I am happy and (relatively) collected. Depending on the type of person your dad is and the type of bipolar disorder he has, I would wholeheartedly reccommend it in a situation similar to mine.