Compounds, metallic lithium, and their isotopes used for the production of various types of lithium. It is also used to prepare catalysts for chemical reactions. Semiconductors, ceramics, television, pharmaceuticals, and atomic energy industries also have applications. Used as an analytical reagent in analytical chemistry. It also has applications in lithium-ion batteries. Used as a coagulant in cement additives.

Lithium carbonate has a significant inhibitory effect on mania and can improve emotional disorders in schizophrenia. The therapeutic dose has no effect on the mental activity of normal individuals. The mechanism of action may be to inhibit the release of norepinephrine at synaptic sites in the brain and promote reuptake, which has an effect on increasing peripheral blood cells. This drug has a certain therapeutic effect when used in small doses for uterine fibroids with excessive menstruation, and can also be used in small doses for acute bacterial dysentery. Lithium salt has no sedative effect and is generally used in combination with chlorpromazine or fluoropiperidine for severe acute mania patients. After acute symptoms are controlled, lithium carbonate alone can be used for maintenance