Abstract: The present invention concerns aryl and heteroaryl substituted pyrazinone derivatives having antagonistic melanin-concentrating hormone (MCH) activity, in particular MCH-1 activity according to the general Formula (I) a pharmaceutically acceptable acid or base addition salt thereof, a stereochemically isomeric form thereof, an N-oxide form thereof or a quaternary ammonium salt thereof, wherein the variables are defined in Claim 1. It further relates to their preparation, compositions comprising them and their use as a medicine. The compounds according to the invention are useful for the prevention and/or treatment of psychiatric disorders, including but not limited to anxiety, eating disorders, mood disorders, such as bipolar disorders and depression, psychoses, such as schizophrenia, and sleeping disorders; obesity; diabetes; sexual disorders and neurological disorders.