harm reduction guide

Cannabis Harm Reduction Guide

also known as: weed, marijuana, THC, CBD

Cannabis is the most widely used psychoactive substance worldwide. While generally considered lower-risk than many substances, it's not without risks — especially for heavy users, young people, and those with predispositions to anxiety or psychosis. Understanding THC/CBD ratios, dosing, and routes of administration goes a long way.

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Effects

  • ✦Relaxation and stress relief
  • ✦Euphoria and altered perception
  • ✦Increased appetite
  • ✦Heightened sensory experience (music, food, touch)
  • ✦Time distortion
  • ✦Anxiety and paranoia at high doses or in sensitive individuals

Duration

1–3 hours smoked/vaped, 4–8 hours edibles

Dosage

Individual sensitivity varies. Always start at the lower end if you're new to this substance.

Edibles — threshold1–2.5 mg THC
Edibles — light2.5–5 mg
Edibles — common5–15 mg
Edibles — strong15–30 mg+

Risks

  • ⚠Anxiety and panic reactions, especially with high-THC products
  • ⚠Cannabis use disorder with heavy daily use
  • ⚠Impaired memory and cognition with heavy adolescent use
  • ⚠Psychosis risk in genetically predisposed individuals
  • ⚠Respiratory issues from combustion (vaping is lower risk)
  • ⚠'Greening out' — nausea, dizziness, and dysphoria from too much THC

Harm Reduction Tips

  • ✓Start low, go slow — especially with edibles, which take 30–90 minutes to kick in
  • ✓High-CBD strains and products can offset THC anxiety
  • ✓Vaping whole flower is significantly less harmful to lungs than smoking
  • ✓If you 'green out': lie down, stay calm, eat something sweet, and remember it will pass
  • ✓Avoid daily use if possible — regular breaks prevent tolerance and dependence
  • ✓Avoid if you have a personal or family history of psychosis or schizophrenia
  • ✓Don't drive — impairment is real even when you feel functional

Dangerous Combinations

Always research interactions before combining any substances.

  • ✕High-dose psychedelics — can dramatically amplify anxiety and paranoia
  • ✕Synthetic cannabinoids (K2/spice) — not the same as cannabis; extremely dangerous
  • ✕Alcohol — 'crossfading' significantly amplifies intoxication and nausea

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This guide is for educational and harm reduction purposes only. It is not medical advice. Content informed by Psychonaut Wiki.