Psychedelia stirs emotion from the soul! All music should be able to do this but unfortunately there is a whole load of crap out there. The best psy trance really moves you as does quality laid back stuff. Leave the genre and you still get really psychedelic stuff. Listen to Enigma's 3rd album, very Trippy! or some of Enya's early work could produce hallucinations without drugs.
Its just a shame most people listen to STEPS or Take That, music? Im not sure. It definately doesnt stir any emotion in me. Come to Japan where the pop is so bad it sounds like a rusty hinge but the psychedelic stuff is classy futuristic stuff. Check of JP Noir.