My husband ran out before our wedding and couldn't get more till ...

My husband ran out before our wedding and couldn't get more till a few weeks after we got back, the first few days were hard, after that if was like he wasn't BiPolar anymore. Against my wish he went back on it, and he seems to be dependent on it. His son's birthday triggers and episode every year, and this year was bad (he lives like 4,000 miles away~ and haven't seen him in 4 months) even then was for the wedding (he was in town for 3 days) He started to take more what was prescribed a lot more. and now he is trying to start taking it normal again however he is taking half the dose. Now he feels like he has NO ENERGY AT ALL! Is this normal????????? What can I do to help him? part 2 when he doesn't take it he sleeps like a baby. where as when he is on it he has massive panic attacks and is up on and off during the night.