1. A hallucinogen is a psychoactive agent which can cause hallucinations, perception anomalies, and other substantial subjective changes in thoughts, emotion, and consciousness. Common types are psychedelics, dissociatives, or deliriants.
  2. Possible physical effects of lysergic acid diethylamide (LSD).

    Tetrahydrocannabinol; THC

  3. A psychedelic substance is a psychoactive drug whose primary action is to alter cognition and perception, typically by agonising serotonin receptors.
  4. Cannabis, also known as marijuana, is often consumed for its mental and physical effects, such as heightened mood, relaxation, and an increase in appetite.
  5. Tetrahydrocannabinol is the principal psychoactive constituent of cannabis.
  6. LSD is a psychedelic drug of the ergoline family, well known for its psychological effects - which can include altered thinking processes, closed- and open-eye visuals, synesthesia, an altered sense of time, and spiritual experiences.

  7. Possible physical effects of lysergic acid diethylamide (LSD).

  8. Ecstasy (MDMA) is a psychoactive drug consumed primarily for its euphoric and empathogenic effects. Pharmacologically, it acts as a serotonin-norepinephrine-dopamine releasing agent and reuptake inhibitor.