Active doses for LSD are between 0.5 and 2 mcg/kg (100–150 mcg per dose).

LSD is best absorbed under the tongue. Keep the tab in your mouth for 10 minutes, and then spit it out.

While there is no known lethal dose of LSD, extremely large doses can lead to psychosis.

Emotional and Cognitive Effects

  • hallucinations
  • distorted visual perception of shapes, colours
  • altered sounds
  • flashbacks (a return of the “trip” experience) days or months later

Physical Effects

  • distorted visual perception of shapes and colours
  • rapid heart rate
  • increased body temperature
  • high blood pressure
  • dilated pupils
  • nausea
  • difficulty sleeping

Typical Timeline

  • Onset: 20-45 minutes
  • Peak Effects: 2-4 hours
  • After effects: 12 hours+

Best Practices

    • LSD effects last 8-10 hours and can keep you up so plan to take it when you have sufficient time to enjoy the effects.
    • Keep your body temp down and your water and electrolyte intake up.

    • Know your substance, your mind and your body.

    • Don’t take too much; starting with a lower dosage is best.
    • Reduce or avoid mixing stimulants, other drugs and alcohol.


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Lysergic acid diethylamide (LSD), also known as Acid or Lucy, is capable of causing mystical experiences and ego dissolution. It is used mainly as a recreational drug or for spiritual reasons. LSD is both the prototypical psychedelic and one of the “classical” psychedelics, being the psychedelic with the greatest scientific and cultural significance.

LSD (lysergic acid diethylamide), first synthesized in 1938, is an extremely potent hallucinogen. Hallucinations are when you see, hear, feel, taste, or smell something that seems real but is not.

LSD is synthetically made from lysergic acid, which is found in ergot, a fungus that grows on rye and other grains. It is so potent its doses tend to be in the microgram (mcg) range. Its effects, often called a “trip”, can be stimulating, pleasurable, and mind-altering.

LSD is a psychedelic drug. Effects typically include intensified thoughts, emotions, and sensory perception. The user may also experience impaired depth and time perception, with a distorted perception of the size and shape of objects, movements, colour, sound, touch and their own body image. Sensations may seem to “cross over,” giving the feeling of hearing colours and seeing sounds. These changes can be frightening and can cause panic. Some LSD users also experience severe, terrifying thoughts and feelings, fear of losing control, and fear of insanity or death. At sufficiently high dosages, LSD manifests primarily in visual, as well as auditory, hallucinations.

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