The present invention relates to tricyclic quinoline and quinoxaline derivatives, to a pharmaceutical composition containing such compounds, to their use as modulators, especially agonists or partial agonists, of the 5-HT2C receptor, their use for preparing a medicament for the prevention or treatment of conditions and disorders which respond to the modulation of 5-HT2C receptor, and to a method for preventing or treating condi-tions and disorders which respond to the modulation of 5-HT2C receptor.本發明係關於三環喹啉及喹噁啉衍生物,關於一種含有該等化合物之醫藥組合物,關於其作為5-HT2C受體之調節劑(尤其促效劑或部分促效劑)的用途、其用於製備供預防或治療對5-HT2C受體之調節作用有反應之病狀及病症用之藥物的用途,及關於一種用於預防或治療對5-HT2C受體之調節作用有反應之病狀及病症的方法。