1. The authors investigated the possible antimanic properties of a Calcium channel blocker, Verapamil, in 15 in-patients admitted consecutively to the female psychiatric ward at Pisa University for a manic episode. 2. The results showed that most of the patients presented a global improvement of the manic symptoms and, in some cases, even a complete clinical remission. 3. Although it was necessary to add chlorpromazine for the severe conditions of several patients, verapamil appeared to speed the positive outcome and to lead to a faster resolution of the symptoms. In addition, the association of verapamil and chlorpromazine did not produce any relevant side-effect. These preliminary findings thus indicate that verapamil by itself does not seem to be sufficient in the treatment of a severe affective episode, but it may constitute an alternative to lithium salts in association with neuroleptics.