I agree with what, okie and the others have said here.
I urge you to see if your pdoc's office has any samples or can direct you to where you can get them to hold you over, cause 50mg is not the therapeutic dose for Bipolar, in fact my pdoc said that 150mg per day is the lowest therapeutic for many.
It's really sad things have to be like this, it's also sad when companies,and/or people "pretend" that they do not discriminate, but they do.
I wish you lots of luck with this and want you to feel free to let us know how things go, if you wish to.
Take care,
DE