Tandospirone (Sediel), also known as metanopirone, is an anxiolytic and antidepressant used in China and Japan, where it is marketed by Dainippon Sumitomo Pharma. It is a member of the azapirone and piperazine chemical classes and is closely related to other agents like buspirone and gepirone. == Medical uses == Tandospirone is most commonly used ...