One of the oldest type of hallocinogens

Opium should be one

Overall there are only three types of Hallucinogens they are Psychedelics, Dissociates, Deliriants  the affects of the Hallucinogens on the brain can be -Ability to control one’s behavior -Muscle movement controls -Emotional state -Feelings of hunger -Sensory perceptions -Sexual drive i hope this helps.

The shaping always moves forward. even if the progress breaks down you have to take a step back before moving forward again but there is no such thing as backward shaping