Complex sentence: Abuse of hallucinogens can trigger delusional and other psychotic phenomena long after cessation of use and cannabis may trigger panic attacks during intoxication and with use it may cause a state similar to dysthymia.
Split into simpler sentences: Abuse of hallucinogens can trigger delusional and other psychotic phenomena long after cessation of use. Cannabis may trigger panic attacks during intoxication and with continued use, it may cause a state similar to dysthymia.