You could try Dramamine II (meclizine); it is a little less drowsly and still could make you trip. Ambien (zolpidem) and to a lesser extent Sonata have similar trippiness, but they will also make you drowsy. Anticholinergics in general do this at high doses; the classical ones are the belladonna alkaloids (datura etc) but these are extraordinarily dangerous. Nutmeg has purportedly similar effects. Some people get visuals off DXM though this is not the primary effect.
If you really want a psychedelic experience I recommend you just get ahold of (or wait until you can) a classical psychedelic or dissociative such as LSD or K. These are much more pleasant.