Harm Reduction Tools
Calculators, checklists, screening tools, and reference guides for safer use and for recovery.
calculators & converters
Precise measurement tools. Accuracy prevents overdose — never eyeball a dose.
Calculate concentration and measurement for dissolving substances in liquid. Essential for sub-milligram dosing.
Convert between mg, µg, g, ml, and other common measurement units. The difference between mg and µg is 1000x.
Convert doses between benzodiazepines using Ashton Manual pivot equivalences. Per-value provenance, half-life reference, and mandatory tapering safety framing.
timing & tolerance
When effects start, peak, and fade — and how long tolerance takes to reset.
interactions & contraindications
What a combination or an existing medical condition does to the risk. Every result states its severity.
Check two or more substances against recorded interactions, each with its severity and mechanism. An unlisted combination is untested, not cleared.
Select medical conditions to see which substances carry absolute or relative contraindications against them, with the recorded mechanism.
preparation & safety
Tools for before, during, and after. Preparation is the highest-impact harm reduction practice.
Interactive pre-session preparation checklist covering mindset, environment, safety supplies, and integration planning.
Generate a printable card with substance, dose, timing, emergency contacts, and medical information.
Customizable safety supply checklist for festivals and events. Select substance categories for tailored gear recommendations.
screening & reflection
Honest self-assessment tools. No judgment — just data about your relationship with substances.
Validated screening instruments (AUDIT, DAST-10) with scoring and interpretation. Private — nothing is stored.
How habit-forming is a substance? Physical and psychological dependence, compulsive redosing, and dose escalation — with a path to support.
Structured post-experience journaling prompts for processing, insight capture, and behavioral intention setting.
data exploration
Tools for exploring and comparing substance data.
in-depth guides
Comprehensive reference guides that require careful reading.
General withdrawal timeline reference for 7 substance classes. Peak severity, danger signs, and when to seek medical help.
Tolerance & Cross-Tolerance GuideHow tolerance develops, resets, and carries across substances. The reason an old dose can be too strong after a break.
Routes of Administration GuideHow route affects onset, duration, bioavailability, and risk. A dose without its route is not a dose.
Reagent Testing GuideWhich reagents to use, how to read the colour reactions, and what a reagent kit cannot tell you.
Drug Checking ServicesGetting a substance tested: reagent kits, mail-in lab analysis, on-site services, and how to read the results.
Safer Injection GuideSterile technique, vein care, overdose prevention, and access to clean supplies. If you are not currently injecting, consider a different ROA.
Safer Snorting GuideIntranasal harm reduction: preparation, technique, nasal care, and why equipment is never shared.
MDMA Supplementation ProtocolWhat the evidence does and does not support for reducing MDMA neurotoxicity and oxidative stress.
How to Read a Substance PageDose tables, duration curves, interaction severities, and confidence levels — what each panel means before you act on it.
crisis & recovery
The exit is always open. These resources exist for when you're ready — or when you're not sure yet.
Psychedex tools serve a dual mandate: helping people use substances more safely and providing clear pathways out when they choose to stop. Every tool that assists with safer use is paired with screening, recovery, and support resources.
All safety-critical tools are free and always will be. They are never paywalled.