Cymbalta - What medicine can work for bipolar depression?

There are literally dozens of medications that can help with bipolar depression including antidepressants, antipsychotics, and mood stabilizers.
https://www.drugs.com/condition/depression.html
Latuda was originally used for treating schizophrenia but has now been approved for Bipolar depression.
https://www.drugs.com/latuda.html
It's often prescribed along with a mood stabilizer like Lamictal and Tegretol.
Treating Bipolar depression can be a bit tricky and you'd need to stay in close touch with your doctor. You may have to try more than one medication or combination of medications.
Best regards and I hope this helps. If you have more questions you can just comment below.