For what it is worth, I am rapid cycle BP2 on 1200 lithium, doing well overall with no weight gain. I also take 1500 Depakote. Certainly, these interact differently with different people but I am surviving it well.

What to do next? Talk to your doc about dosage or perhaps switching medication. Don't forget - the dosage is the "sweet spot" for efficacy. It could be higher or lower.....we don't always know until we test it out.

Or perhaps you might need a bit more time on 900 to see if it helps.

Another consideration - look at things like diet, exercise, sleep, and other things that can help. BP will always be with us and we can't always rely on medication. Despite my medication, I still have my moments and I'm dropping more tablets than they did at Woodstock.