Psychiatry Substance abuse 0d30d72e All the following drugs are hallucinogens except A Mescaline B Phencyclidine C Ketamine D Pentostatin High-Yield Explanation Pentostatin is an anticancer drug Hallucinogens-LSD,Phencyclidine,ketamine,mescaline etc Ref: Essentials of postgraduate psychiatry By JN Vyas 1st ed Pg. 326