Ketamine Harm Reduction Guide

Effects

• ✦Dissociation and altered sense of self
• ✦Euphoria and dreamlike states
• ✦Analgesia (pain relief)
• ✦Visual distortions and altered perception
• ✦K-hole: complete detachment from reality at high doses
• ✦Short duration compared to other psychedelics

Duration

45–90 minutes (insufflated), 15–30 minutes (IV)

Dosage

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

Risks

• ⚠Ketamine bladder syndrome — severe, irreversible bladder damage from frequent use
• ⚠Psychological dependence — dissociatives can be habit-forming
• ⚠Cognitive impairment with heavy long-term use
• ⚠Risk of injury due to loss of motor control and coordination
• ⚠Respiratory depression at very high anaesthetic doses (rare recreationally)

Harm Reduction Tips

• ✓Limit frequency — use no more than once per week, ideally much less
• ✓Bladder health is the biggest concern; if you notice pain urinating, stop immediately and see a doctor
• ✓Stay seated or lying down — ketamine severely impairs coordination
• ✓Never use alone at high doses — loss of consciousness is possible
• ✓Avoid redosing repeatedly; tolerance builds quickly and bladder risk compounds
• ✓Stay hydrated but don't drink alcohol alongside ketamine
• ✓Be mindful of psychological dependence patterns — if you're using to escape regularly, that's a warning sign

Dangerous Combinations

Always research interactions before combining any substances.

• ✕Alcohol — dangerous CNS/respiratory depression
• ✕Benzodiazepines — amplified sedation and respiratory depression
• ✕Opioids — serious respiratory depression risk
• ✕Other depressants — stack dangerously with ketamine's sedative effects