No idea, I used to take seroquel and my lithium at the exact same time. I never had any problems with this combo.

I get panic attacks sort of experiences while I am sleeping, and especially while I am falling asleep. I'm not really sure tho, I don't want to say it is probably such and such since I don't know.

I notice a difference with seroquel after 2-3 weeks, I use it for acute mania. Lithium usually takes longer for me to notice a difference, usually around a month or so.