How to handle a bipolar SO?

Hi, I've been with my SO for some years and a couple years ago, she was diagnosed with Bipolar disorder. She was good for a while, but is relapsing and doesn't want to take medicine or see their doctor.
I know that's a no-no. She is also always angry and talks about people out to get her, that we (her family and I) know that it's all in her head.
I've read all of the websites about how to deal with it, but I feel somethings missing.
Most advise is written from doctors who handle patients from 9-5, but don't live with someome 24/7.
How about advise from the family who lives with this?
Is anyone going through this and having success with their SO/family member?

Thank you.
How to handle a bipolar SO?
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