I would consider trazadone, but i've heard problems of morning hangovers, and i'm already on an SSRI (fluoxetine).

As for DXM.....
A) dm cough syrup is DM because it has guafanestine in it. This substance will make you extremeley nauseos in high amounts. The best to take for OTC DXM only containing products are robo max, or dexalone, or the new robitussin gelcaps with only 15mg dxm each.
B) DXM is a disassociative anethestic, and long term use of certain disassocitaves has been linked to brain damage.
C) Taking DXM at the same time as a SSRI has a risk of seretonin sydrome (which ssri's and seretogenic drugs in general carry the risk of), which is a potentially FATAL disorder.

-----------------------harm reduction only----------------
DXM IS DANGEROUS
IT WILL HURT YOU IF YOU USE IT IN HIGH DOSES TOO OFTEN
http://www.third-plateau.org
plz don't flame me for that link, i'm just trying to stop
people from taking dxm without knowing the FULL risk
involved. Last thing I want to hear about is some
kid dying because he took a package of coricin.

----------------------harm reduction-------------