so I just started lithium carbonate yesterday after a terrible reaction to seroquel. seroquel made me feel unmotivated, agitated, twitchy and it made my heart beat like crazy.

I was diagnosed bipolar II hypomanic about a week ago along with major depressive disorder. I'm just curious if 450 mg of lithium carbonate is too much. my cycles happen rather fast and my doctor prescribed me 450 mg a day. is that too much?