How to test benzodiazepines
This version has been translated from Polish and links to the relevant test kits have been added. In a life-threatening situation call 112. This article is informational and serves harm reduction. It does not encourage the use of psychoactive substances and does not replace medical advice.
You test them with zimmermann, which comes in the benzodiazepine kit alongside ten fentanyl strips. The reagent confirms that a benzodiazepine is present and reads clonazepam distinctively, so it separates a real tablet from the paracetamol and chlorpheniramine pressings that turn up in this market. Naming which benzodiazepine is a laboratory question, and the strips cover the outcome that matters most.
Benzodiazepine and fentanyl kit, 17.16 EUR
What the labs find
Across 571 samples submitted as a benzodiazepine, 30% contained a second compound, and the most common thing found that was not the expected benzo was ethylbromazolam, in 62 of them.
| Detected alongside | Samples |
|---|---|
| Ethylbromazolam | 62 |
| Paracetamol | 22 |
| MDMA | 21 |
| Caffeine | 20 |
| Promethazine | 12 |
| Heroin | 11 |
| 6-MAM | 11 |
What was in 101 Galenika blisters · Browse the alerts database
What zimmermann does and does not do
It rules out the tablet that contains no benzodiazepine at all, which is the paracetamol pressing and the chlorpheniramine pressing, and it identifies clonazepam distinctively. Beyond that it reports a family rather than a member. Since the designer benzodiazepines in that table are active at different doses from the pharmaceutical ones they replace, the family answer is not enough to dose on, and the honest next step is a laboratory.
Benzodiazepines and fentanyl kit, 17.16 EUR · Zimmermann reagent, 7.30 EUR · How to detect clonazepam
The strip matters more than the reagent
Eleven of those 571 samples contained heroin or 6-MAM, and two contained a nitazene. Rare, but it is the only outcome in this family where the failure mode is respiratory arrest rather than a long sleep, and no reagent shows either. The benzo kit ships with ten fentanyl strips for that reason.
Fentanyl test strip · Nitazene test strip · Full lab analysis, 99 EUR
Questions?
Which reagent tests benzodiazepines?
Zimmermann. It indicates the family and reads clonazepam distinctively.
Can it tell alprazolam from etizolam?
No. Both are triazolo compounds and read alike, as do clonazolam and ethylbromazolam.
What is ethylbromazolam?
An unlicensed research chemical benzodiazepine that has been appearing in counterfeit pharmaceutical tablets. Roughly 4 mg is comparable to 10 mg diazepam.
Is a home test worth it for benzos?
For ruling out a tablet with no benzodiazepine in it, and for the fentanyl strip, yes. For naming the compound, no.