An electric rotary machine which may be employed as a dc motor in an automotive engine starter. Because the indole carboxylic acid bispyridyl carboxamide derivatives according to the present invention have high affinity for 5-HT2c receptors, act selectively on the 5-HT2c receptors, the derivatives rarely have adverse effects caused by other receptors. Each nano-carrier may include a drug surrounded by an encapsulating medium.