I had a 1.69 toxicity that landed me in the hospital and today just a random check it was 1.4...1.2 being the top end of acceptable. I am not playing with my meds. Believe me I usually do but this time I didn't. I have severe mania with hallucinations and I don't want to go off my lithium but I don't know why it keeps going into the toxic level. One time my vision disappeared when it was toxic, it was scary.