<prompt> Prophylactic maintenance serum level of lithium is :0.5 - 0.8 mEqL0.7 - 1.2 meqL1.2 - 2.0 meqL2.0 - 2.5 meqL  <response>: Blood lithium levels :Therapeutic level : 0.8 - 1.2 mEqL.For tt of acute maniaProphylactic level : 0.5 - 0.8 mEqL. For relapse prevention in bipolar disorderToxic lithium levels : 2.0 mEqL. 