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PLUGGUIDE
Jonas K.
Editor

Jonas K.

Lead writer · harm reduction & substance guides

Gothenburg, Sweden

12 years writingharm reductionsubstance pharmacologyfestival safetydosing tools

Jonas started writing about substances in 2014 after losing a friend to a counterfeit pill. He has volunteered with The Loop (UK) and DanceSafe-style operations across multiple European festivals, and ran a community testing program in Gothenburg before contributing here. His substance pages are based on years of community feedback, peer-reviewed pharmacology, and field observations — not abstinence-only talking points.

Articles by Jonas

Guide

DIMS Netherlands 2026: how to anonymously test drugs in the Dutch system

Complete guide to the Drug Information and Monitoring System (DIMS). Locations, what they analyse, response times, and what the result actually tells you.

Guide

Energy Control 2026: how to send drug samples to Spain's testing service

Complete guide to Energy Control. How to send samples by mail from anywhere in Europe, anonymity, prices, what they analyse, and how to read the results.

Safety Deep Dive

Cocaine adulterants in Spain 2026: levamisole, phenacetin, and how to detect them

What cuts actually show up in Spanish cocaine in 2026 according to Energy Control data. Health risks of each adulterant and how to test.

Safety Deep Dive

Fentanyl in France 2026: what we know, what we don't, and how to protect yourself

State of fentanyl and nitazene contamination in the French drug market in 2026. Detection data, test strips, naloxone access, and what to do.

Guide

Drug checking in Italy 2026: where to actually test substances

A practical map of drug checking in Italy. What exists (not much), how to use reagent kits, and how to mail samples to Energy Control in Spain or DIMS in the Netherlands.

Safety Deep Dive

Dangerous MDMA pills in Italy 2026: active warnings and how to test them

MDMA pills currently dangerous in Italy. How to spot the patterns, where to test, and what to do if someone has reactions.

Safety Deep Dive

Dutch pill warnings 2026: current MDMA red list and dangerous combinations

The Unity and DIMS red list, which MDMA pills on the Dutch market are extremely overdosed or adulterated, and how to protect yourself.

Guide

Drug checking in France 2026: Psychoactif, ASUD, and the French harm-reduction landscape

A guided tour of French harm reduction. Psychoactif, ASUD, Médecins du Monde, where to find reagent kits, and how to mail samples for proper lab analysis.

Testing

Best Reagent Test Kits 2026: EU Buyer's Guide

Compare the best reagent test kits available in Europe in 2026. DanceSafe, EZ Test, Bunk Police and more, with EU shipping info and pros/cons.

Guide

Best Substance Shops 2026: How to Spot Legit Vendors

A safety-first guide to evaluating substance vendors in 2026, covering red flags, signal checks, and why most 'best shop' lists are scams.

Guide

First Time Taking MDMA: The Complete Guide

Complete harm-reduction guide for first-time MDMA users. Learn about dosage, set and setting, reagent testing, comedown management, and the three-month rule.

Safety Deep Dive

How Long Does Cocaine Stay in Your System?

Learn how long cocaine and its metabolite benzoylecgonine stay detectable in urine, blood, saliva, and hair. Detection windows and drug tests.

Safety Deep Dive

How Long Does MDMA Stay in Your System?

Learn how long MDMA stays detectable in urine, blood, saliva, and hair. Detection windows, half-life, metabolism factors, and drug test info.

Testing

How to Test MDMA at Home: Reagent Kit Guide

Step-by-step guide to testing MDMA with Marquis, Mecke, and Mandelin reagent kits. Reaction colours, common mistakes, and what the results mean.

Safety Deep Dive

Ketamine and Alcohol: Why This Mix Can Kill

Why mixing ketamine and alcohol is dangerous, the pharmacology behind respiratory depression, behavioural risks, and practical safer use advice.

Safety Deep Dive

Ketamine Bladder Damage: Prevention and Warning Signs

Prevent ketamine bladder damage: weekly limits, early symptoms of ulcerative cystitis, hydration tips, and when to see a urologist.

Editorial

The Plug Guide launches: an independent harm-reduction and market-intelligence platform

Why we built it, what it covers, and what it will never become.

Comparison

LSD vs Psilocybin: Honest Comparison Guide

Direct comparison of LSD and psilocybin covering onset, duration, headspace, body load, dosage, and integration. Practical info for informed decisions.

Guide

MDMA Comedown Guide: Timeline, Tips and Recovery

Practical guide to the MDMA comedown covering how long it lasts, why it happens, what actually helps recovery, and what is just snake oil.

Comparison

MDMA vs MDA: Key Differences Explained

Compare MDMA and MDA (sassafras): effects, duration, neurotoxicity, dosing, and reagent testing differences for safer use.

Guide

Psilocybin Microdosing Protocols: Fadiman and Stamets

Compare the Fadiman and Stamets psilocybin microdosing protocols. Dosage ranges, schedules, what the research actually shows, and who should avoid it.

Logistics

Receive Packages Anonymously in Germany (2026)

Privacy-focused guide to receiving packages anonymously in Germany. Covers pseudonyms, Packstations, ID requirements, and what this guide does not cover.

Guide

Safer Cocaine Use: Harm Reduction Guide

Practical harm reduction for cocaine: snorting hygiene, pacing, line size, dangerous interactions, and when to seek help.

Safety Deep Dive

Festival survival essentials for MDMA users

Hydration, electrolytes, temperature, sleep, food. The boring stuff that prevents the most common — and most preventable — festival harms.

Safety Deep Dive

How to help someone through a difficult psychedelic experience

Calm, evidence-based guidance for sitting with someone who is having a hard time on a psychedelic. What helps, what doesn't, and when to call for help.

Testing

How to use a reagent test kit properly

A field guide to reagent testing — what kits actually tell you, what they don't, and how to interpret the colors without fooling yourself.

Vendor reviews by Jonas