A pharmaceutical composition for treating a disorder that is treated by modulation
of serotonergic neurotransmission comprising administering (7S,9aS)-cis-2-Benzo[d]isoxazol-3-yl-7-(3-pyrrolidin-1-ylmethyl-phenoxymethyl)-octahydro-pyrido-[1,2-a]pyrazine
and sertraline is disclosed.