I take 300mg Lithium in the morning around 8:00am and another 600mg in the evening at about 6:00pm.

I know that you're not supposed to feel MSs/APs "kick in" like you do with Klonopin or Ritalin, but usually around 3-4pm I feel like I can feel the Lithium "wearing off" ... I feel more tense / anxious and my thoughts begin to race and become more bizarre in nature. Similarly in the mornings when I wake up I feel almost hyperactive before taking my dose, this morning as I walked into the office (I always take my morning dose while I eat breakfast at my desk b/c I don't like taking it immediately before driving) a couple of our clients approached me and began asking me questions and I could barely concentrate on what they were saying!

Does this happen to anyone else, or this more of a placebo effect sort of thing?