Hallucinogens are a very broad and diverse group of groups that are used to alter perception, thoughts, and feelings.

They can be categorized into three main categories:

  • Psychedelic drugs, such as marijuana, MDMA, LSD, and shrooms, have the ability to produce changes in consciousness and perception that are unfamiliar.
  • Dissociatives, such as PCP, ketamine, and DXM produce similar alterations as psychedelics, but include feelings of depersonalization, where an individual feels disconnected from their body.
  • Deliriants, such as benadryl, hyoscine, and atropine, produce vivid and commonly very unpleasant hallucinations.

Health Risks


  • Increased heart rate
  • Nausea
  • Intensified feelings and sensory experiences
  • Increased blood pressure, breathing rate, or body temperature
  • Loss of appetite
  • Dry mouth
  • Sleep problems
  • Paranoia—extreme and unreasonable distrust of others
  • Psychosis—disordered thinking detached from reality


  • Speech problems
  • Memory loss
  • Weight loss
  • Anxiety
  • Depression and suicidal thoughts

Treatment Options

  • Detox
  • Behavioral Therapies