Evidence-Based Safety
Drug Harm
Reduction Guide
Comprehensive, evidence-based harm reduction information. No judgment. The goal is to reduce risk and save lives through knowledge — regardless of legal status. Based on public health research and DanceSafe guidelines.
Core Principles
Harm Reduction
Fundamentals
The 8 evidence-based principles that form the foundation of effective harm reduction — drawn from public health organizations including DanceSafe, The Loop, and The Zendo Project.
Test Your Substances
Use reagent testing kits to identify substances before ingestion. Marquis, Mecke, Simon's, and Mandelin reagents can identify most common substances. Fentanyl test strips are essential for any substance that might contain opioids — this includes cocaine, MDMA, and methamphetamine due to cross-contamination.
Start Low, Go Slow
Begin with a fraction of your intended dose (10-20%) and wait at least 60-90 minutes before considering redosing. Potency varies dramatically between batches. What was your normal dose last month may be 2-3x stronger today. "Start low, go slow" has prevented thousands of overdoses.
Never Use Alone
Have a trusted sober person present whenever possible. If alone use is unavoidable: call the Never Use Alone hotline (US: 1-800-484-3731) before starting. A real person stays on the line and calls emergency services if you stop responding. The service is free, confidential, and non-judgmental.
Carry Naloxone (Narcan)
Naloxone reverses opioid overdoses within 2-3 minutes. Available without a prescription in most US states, most EU countries, and the UK. The NEXT Distro program mails free naloxone kits across the US. NEVER wait to see if someone "walks it off" — administer immediately and call emergency services.
Avoid Mixing Substances
Combining depressants (opioids + alcohol + benzodiazepines) compounds respiratory depression exponentially — not additively. Two "safe" amounts combined can be fatal. Stimulant + depressant combinations mask warning signs. If mixing is unavoidable, research specific interactions at TripSit's drug combination chart.
Know Overdose Signs
OPIOID OD: slow/stopped breathing (<8 breaths/min), blue/purple lips or fingertips, unresponsive, gurgling sounds. Administer naloxone immediately. STIMULANT OD: chest pain, seizures, extreme hyperthermia (overheating), difficulty breathing, extreme agitation. Keep cool, call emergency services. MDMA OD: hyperthermia, seizures, unresponsiveness — cool immediately.
Set & Setting Matter
The mental state (set) and physical environment (setting) in which substances are used profoundly affect outcomes. Psychedelics in particular can become overwhelming in stressful environments. Use in safe, comfortable, familiar environments with trusted people. Prepare mentally — don't use during emotional crises.
Space Your Use
Regular use of many substances leads to tolerance requiring higher doses to achieve the same effect, increasing risk. MDMA is particularly well-studied in this regard — evidence suggests a 3-month minimum between uses to avoid neurotoxic risk. Track use and take breaks. Physical dependence on opioids and alcohol requires medical supervision to safely discontinue.
Substance Profiles
Common Substances
& Safety Info
Evidence-based safety information for commonly encountered substances. Risk levels based on the Nutt et al. harm assessment framework (published in The Lancet).
Includes heroin, fentanyl, oxycodone, hydrocodone, tramadol. Extremely high overdose risk, especially with synthetic opioids. ALWAYS test for fentanyl. Never mix with alcohol or benzodiazepines. Naloxone reverses overdose. Withdrawal is extremely uncomfortable but rarely fatal; seek medical supervision for discontinuation.
Includes cocaine, amphetamine, methamphetamine, MDMA (partially). Risk of cardiovascular events, hyperthermia, psychosis with heavy use. Test for fentanyl contamination in cocaine. Stay hydrated but don't overdrink water (MDMA hyponatremia risk). Take breaks from activity/dancing. Avoid mixing with MAOIs — potentially fatal.
Oral cannabis (edibles) has significantly slower onset (30-90 min) and more potent effects than smoked/vaped. Many overdoses are from taking too much orally after not feeling immediate effects. Cannabis cannot cause respiratory depression or direct overdose, but can precipitate panic attacks, especially in those with anxiety. High THC:CBD ratios increase psychosis risk with heavy use.
Includes LSD, psilocybin, DMT, mescaline, 2C-x compounds. No physical toxicity at normal doses — no overdose deaths from classic psychedelics documented. The primary risks are psychological: overwhelming experiences, impaired judgment (falls, traffic accidents), and rarely HPPD. Set, setting, and a trusted trip-sitter are the most important risk reducers. Avoid entirely if personal or family history of psychosis.
Includes diazepam (Valium), alprazolam (Xanax), clonazepam (Klonopin). Dangerous when mixed with other depressants (alcohol, opioids). Physical dependence develops within 2-4 weeks of daily use. Abrupt discontinuation from heavy use can cause potentially fatal seizures. NEVER stop benzodiazepines cold turkey after heavy daily use — taper under medical supervision. Flumazenil reverses benzo sedation but is short-acting.
Includes ketamine, PCP, DXM, MXE. Risk of "k-hole" (dissociative state): immobilizing and potentially dangerous if in unsafe environment. Ketamine bladder syndrome (ketamine-induced uropathy) occurs with heavy regular use — devastating and sometimes irreversible. Urinary pain is an early warning sign. Take breaks. Avoid redosing excessively. Never drive or operate machinery.
Risk of hyperthermia (overheating) when dancing, especially in hot environments. Take regular breaks from activity. Sip water (not more than 500ml/hour) — hyponatremia (water poisoning) killed more MDMA users in the UK than overheating. Test for adulterants — pills sold as MDMA may contain dangerous substitutes (fentanyl, PMA, 25x-NBOMe). Monthly or less use frequency recommended to reduce neurotoxic risk. Contraindicated with SSRIs/SNRIs (serotonin syndrome risk).
The most widely used depressant and arguably the most harmful overall (Nutt et al. 2010). Synergistically dangerous with all other depressants. Chronic heavy use causes liver cirrhosis, Wernicke's encephalopathy (B1 deficiency), and physical dependence. Alcohol withdrawal (unlike opioid withdrawal) can be fatal — including seizures and delirium tremens. Never abruptly stop heavy drinking — taper or seek medical help.
GHB has an extremely narrow therapeutic window — the difference between a euphoric dose and an overdose dose is small, and varies with body weight and tolerance. NEVER mix with alcohol — even small amounts of alcohol with GHB can cause rapid unconsciousness and respiratory depression. Dose precisely using a marked syringe. GBL converts to GHB in the body but is faster-acting and more potent — reduce dose significantly. Physical dependence develops rapidly; withdrawal can be severe.
Emergency Response
What to Do in
an Overdose
Opioid Overdose
Try to Wake Them
Call their name loudly, rub knuckles firmly on their sternum. No response = overdose situation.
Call Emergency Services
Call 911 (US) immediately. Many jurisdictions have Good Samaritan laws protecting callers from drug-related prosecution. Don't delay calling out of fear.
Administer Naloxone
Nasal spray: one spray in each nostril. Injectable: 0.4mg IM injection. Repeat every 2-3 minutes if no response. Effects last 30-90 min — overdose may return if naloxone wears off before drug does.
Recovery Position
Place them on their side (recovery position) to prevent choking on vomit. Keep airway clear. Stay with them until emergency services arrive.
Stimulant / MDMA Overdose
Assess the Situation
Signs: chest pain, extreme agitation, seizures, body temperature >40°C/104°F, unconsciousness, extreme confusion.
Cool Them Down (Hyperthermia)
Move to cool area. Remove excess clothing. Apply cool wet cloths to neck, armpits, groin. Fan them. Overheating is the most common cause of MDMA fatality.
Seizure Management
Do NOT restrain during a seizure. Move dangerous objects away. Time the seizure. If >5 minutes or person doesn't regain consciousness: call 911 immediately.
Call Emergency Services
Call 911/999 immediately for: unconsciousness, chest pain, seizures, breathing problems, temperature >40°C/104°F. Stay on the line.
Resources
Harm Reduction
Resources
DanceSafe
Non-profit providing drug checking services and harm reduction at events. Free testing kits. US-based.
Visit Resource →TripSit Drug Combo
Interactive drug combination safety chart. Shows safe, dangerous, and caution interactions between substances.
Visit Resource →Never Use Alone
US hotline (1-800-484-3731): stay on the phone with someone while using opioids alone. Free and confidential.
Visit Resource →NEXT Distro
Free naloxone mail-out program in the US. Ships to all 50 states. Also provides clean supplies.
Visit Resource →The Loop UK
UK drug checking service. Analyses substances at festivals and events using mass spectrometry.
Visit Resource →Erowid
Comprehensive database of psychoactive substances: chemistry, pharmacology, trip reports, and safety information.
Visit Resource →Harm Reduction International
Global advocacy and research organization for evidence-based drug policy and harm reduction programs.
Visit Resource →EMCDDA
European Monitoring Centre for Drugs and Drug Addiction. Statistical reports and drug information.
Visit Resource →PsychonautWiki
Comprehensive encyclopedia of psychoactive substances, dosage, effects, and harm reduction information.
Visit Resource →