T40.996 - Underdosing of other psychodysleptics T40.9 - Poisoning by, adverse effect of and underdosing of other and unspecified psychodysleptics [hallucinogens] T40.99 - Poisoning by, adverse effect of and underdosing of other psychodysleptics [hallucinogens] T40.996 - Underdosing of other psychodysleptics