If she is having problems mostly at bed time, maybe a sleep aid would be a better alternative? My brother Mitchell was diagnosed with AHDH and a few other things. He was given a medication that helped him stay calm during the day, and then a sleep aid that was given 30 minutes before bed. He wasn't always given the sleep aid, and my mom and dad had a ton of trouble getting him to bed at night. Once he began taking the sleeping pills, most of the bed time problems went away.
I was diagnosed with depression (which I understand is a lot different from being bi-polar) and was on just a ridiculous amount of drugs. I took a pill in the morning which was an upper, then mid day to mellow, and then one before bed to sleep. After awhile the pills stopped working and the sleeping pills began to make me hallucinate. I think switching the drugs up a little bit, maybe getting rid of some of them and slowly adding new ones might help in your situation.
I'd definately talk to your doctor about sleeping pills, or some sort of downer for around bed time to help her calm down so she can get to bed without being pinned.