schizoaffective bipolar mood disorder ... can black seed oil help?

trying to help a friend

Asalamu alaikum wa rahmatullahi wa barakatu

Yes inshaAllah it could help but that doesn't mean your friend should stop taking her prescribed medication or seeking help from a therapist.

Unplanned withdrawal from psychiatric medication can be
disastrous.

May Allah soothe your friend and give her cure.

thank you