What adamsgirl replied with is valuable,and really is a huge help.
Some hospitals have Behavioural Health departments that have free family support group meetings, which are specifically designed to help the family and friends of those with Bipolar disorder, if not the hospital,many counties have them.
Another thing, check out my post above, this organization's info can help also.
It helps so much when the patient and family/friends work together with this, it really can help prevent some nasty occurences, even quell some episodic behaviour,besides sticking to moodstabilizers as prescribed.
Close communications with the prescribing pdoc is important,keep them in touch how you are feeling, just in case a med change or doage change needs to be done.
I wish you lots of luck, and please know there are many supportive people here.

DE