<p>Although lithium has been used for over 50 years in treatment of bipolar disorder, the mechanism of action is still unknown.&nbsp; Lithium&#39;s therapeutic action may be due to a number of effects, ranging from inhibition of enzymes such as glycogen synthase kinase 3, inositol phosphatases, or modulation of glutamate receptors. Lithium Carbonate alters intraneuronal metabolism of catecholamines and sodium transport in neurons and muscle cells.</p>