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[Pharmacokinetics and toxicology of lithium].

The pharmacokinetics of lithium is reviewed in regard to the pattern of lithium concentration in plasma, red blood cells, saliva and urine and to a four-compartmental model of lithium distribution. An overview of lithium toxicology is given summarizing the gastrointestinal, cardiovascular, endocrine, hematological, dermatologic, teratogenic and neurological side effects of lithium. The results of two controlled studies are described in detail. The investigation of thyroid function in 88 patients under lithium treatment revealed abnormally high values of TSH and/or of TSH response to TRH in 50% of the subjects. By use of daily protocols of eating and drinking over a period of 14 days, a distinctly higher caloric intake (from solid food, not fluids) was found in 10 patients who gained weight during lithium therapy as compared to 10 lithium-treated patients without weight gain.