This is interesting:
https://www.ncbi.nlm...les/PMC3213641/
Highlights
A 5-HT2C antagonist alone did not produce positive conditioned place preference (CPP).
A selective 5-HT2C antagonist potentiated a low dose amphetamine–induced CPP.
5-HT2C antagonists may lack abuse potential, but may potentiate effects of psychostimulants.