Usually classified as antipsychotics containing the
element lithium compounds are used primarily in the treatment of bipolar
disorders, particularly the manic aspect. Lithium's manner of action in the body
is unknown. It does, however, compete with the sodium salts and changes the
composition of body fluids. It can also be toxic and dosage must be carefully
controlled by taking lithium blood levels. Note that some authorities classify
the
lithium salts with the antidepressants.