Trippiest non-psychadelic drug?

[granddaddypercs]

Ketamine seems to fit the bill here as it is pretty short lived and effective in the way you are looking for i believe, however procuring the drug can be problematic especially compared to an OTC DXM.

 

[GolemGolem]

Gabapentin @ 2400 mgs .

-lenses

Love it, only can get high on it every month or two, which helps things.