Some drugs have been known to activate schizophrenia; particularly psychedelics like LSD. However, in order for this to happen, one likely already needs to have

Some drugs have been known to activate schizophrenia; particularly psychedelics like LSD. However, in order for this to happen, one likely already needs to have a genetic predisposition. I use LSD about once every week or two and I haven't noticed any schizophrenia yet, so it is very much a YMMV.