Lithium gave me very bad, constant diarrhea but mentally it helped. I had to stop taking it because I got toxicity from it though. Lamictal made me manic so that med is a big no for me. If anything I'd say your meds might make you a bit tired but that should pass. And yes drink a lot of water on lithium. If you do end up having side effects that are bothersome them contact your new pdoc. It's not uncommon for BP patients to be on a few different cocktails before finding the right one so don't get discouraged. Good luck!

Dx: BP2, PTSD, bulimia/anorexia
Risperdal 4mg
Trileptal 300mgs
Buspar 45mgs
Ativan 1mg PRN
Vyvance 70mgs PRN