Lithium salts in cluster headache treatment.

The short and long-term effects of Lithium carbonate in 90 patients with episodic (68 cases) and chronic (22 cases) cluster headache are reported. The results are discussed in particular in relation to the response of the episodic forms, the development of tolerance, the ability of the substance to modify the natural history of the disease, and the side-effects from long-term treatment.