The British Journal of Psychiatry 128: 61-66 (1976)
© 1976 The Royal College of Psychiatrists
Thyrotoxicosis and lithium
R Rosser
Two cases are presented in which treatment with lithium was complicated by
thyrotoxicosis. The underlying physiological mechanisms are discussed.
Lithium suppresses thyroid function, so the early stages of thyrotoxicosis
may be clinically undetectable. The symptoms and signs of thyrotoxicosis
may be confused with the side effects of lithium, and if lithium is
withdrawn severe rebound thyrotoxicity may occur. Furthermore, some of the
side effects of lithium may be aggravated by thyrotoxicity. These cases
provide further evidence of the importance of routine screening of thyroid
function before starting treatment with lithium.