Heroin & Opioids Testkit



Out of stock

Out of stock

Manufactured in USA

We manufacture & ship locally from Europe

Delivered via FedEx around the world

Discreetly shipped in plain boxes

With our guides and live chat, testing has never been easier


This testkit, more than any others that we offer, could be the one to save your life. Froehde and Marquis reagents can be used to identify if your sample has been replaced with the likes of a benzo, or contaminated with any of dozens of different drugs which can show up in “heroin” samples (we go into more detail on what you might find here). Our BTNX test strips, on the other hand, will detect a dose of fentanyl which would be too small for our reagents (or even an infrared spectrometer) to detect, but which would still be enough to cause death or disability if consumed.

With enough strips to conduct 10 tests (plus an additional freebie, shipped with every order) and enough reagents to conduct over 100 tests on opioids and other drugs with the assistance of our results tool, this kit has everything you need to ensure that you have what you paid for and to use more safely.


In short, to make sure you’re getting what you wanted. Whether through malice or sheer accident, it’s easy to end up with an entirely different substance to the one you were expecting, and that goes for any drug.

We’re assuming you already know about the biblical flood-levels of fentanyl washing through the heroin/opioid supply right now – taking any without testing isn’t so much rolling a dice with your health as it is flipping a coin. This is specifically why we include a big pack of fentanyl test strips (and a freebie, which we add to every order): fentanyl won’t show up in our regular tests because there’s so little of it in each sample, but these dedicated test strips will show it up straight away.

However, fentanyl isn’t the only unwanted substance that might end up in your stash. Heroin can be bulked out with anything from aspirin, caffeine to semi-legal research chemicals and while reagent tests aren’t a great way of determining purity, you can get a better idea by testing for the presence of such substances.

This problem is compounded with other opioids – given the wide variety of pills available, dealers have been known to call any pill they come across “oxy” and end up selling aspirin, Valium or random statins in its place. Fortunately, Marquis and Froehde reagents are the most versatile kits we have for testing such a wide variety of possibilities.

As with any drug that has such a long supply chain (looking at you, cocaine), heroin goes through a lot of middle-people before it reaches you. That creates an awful lot of opportunities for them to bulk it out a little at a time until the final product is a cocktail of impurities, adulterants and random pocket-fluff which might contain some heroin.

This is why we include Marquis and Froehde, our most versatile testkits: with them you can check that your supply actually contains heroin, then start working out whatever else might have found its way in there on its long journey from the Golden Triangle to your baggie.

We have also included dedicated fentanyl strips: while fentanyl is primarily a North-American problem at the moment, these markets rarely work in isolation for long and samples have intermittently been identified in testing sites (and, if we may be morbid for a moment, morgues) around the world. Fentanyl is so potent that a fatal dose is smaller than our regular kits can detect in a sample, but these strips will be able to identify it.

Other opioids are worth testing too – just because yours is pressed into a pill or even sold in a foil pack doesn’t mean that it is as clinically-pure as it claims to be. Professional presentation can hide extremely shoddy substances, so it’s always better to have your own means of determining whether or not you’re getting what you paid for.


1. Prepare
Prepare a tiny bit of your drug on a white ceramic plate or mug.
Tip: You should use the same amount of powder as on a matchstick head, or a grain of rice. If you’re testing blotters, use 1/6th of a blotter.
2. Test
Simply remove the cap from your bottle and tilt it until a drop falls out.
From the moment the testkit liquid hits the sample, watch closely for 30-60 seconds for any colour changes.
Tip: Many samples will have an initial colour change followed by another over time, so it’s important to keep a close eye on them.
Make sure that the sample doesn’t touch the bottle tip.
3. Search
DoseTest offers a one of a kind tool to filter your results and find out what your sample could be. Just head here and enter your results to find out what you got.


Above and beyond!

The service was above and beyond. Completely blew my expectations out of the water. Incredible shipping times, and excellent customer service. 11/10!

Emanuel K.
Great service

Fast shipping. Excellent customer service – they were very helpful when I had questions. Seem like good folks. Test worked as it should!



Quick delivery and the product works as intended/advertised. Website of DoseTest contains a lot of detailed information how the testkits should react with all substances. Very much recommended!

Dick T
Amazing team
This is my favorite vendor for the US. All their prices are very affordable. Shipping is very quick. Their customer service is very quick and helpful. They have a team that’s active on reddit communities helping people with questions. Can’t recommend them enough.


Is it safe shipping testkits and are your packages discrete?

Testkits are a legal product, and commonly used by harm reduction organizations.

We do not ship the test kits with anything that hints towards substance use, such as reaction cards, a receipt with a link to our site and even use abbreviations for the labels instead of the reagent’s full names.

So to put it simply, all our orders are packaged extremely discretely and with care of privacy.

How long do testkits last?

One year is to be expected in optimal storage conditions but shelf life varies with each reagent as well as to what conditions you have stored them.

Keep the test kits out of light, in cold storage and do not leave the bottles un-capped any longer than necessary.

To see if your test-kit is still valid after long term storage test common substances like Vitamin C, Aspirin, Ibuprofen, Paracetamol or any known substances (i.e an sample you know for sure is a certain substance) and see if the reaction is correct in reference to our reagent tool

Where does my order ship from?

DoseTest is a multi-national company, so we have distribution from both Europe & the United States.
All European orders are shipped from Europe.

All USA and orders from other countries are shipped from USA.

Can I get help when testing?

Ofcourse! We have a live chat on our website, where you can talk to us incase you need any assistance when testing or have any questions.

Can this kit test for fentanyl?

This test kit contains fentanyl test strips! They are a very sensitive and easy way to test for fentanyl in any sample. Using the reagents for fentanyl is not ideal because the colors produced with fentanyl are faint and will be overpowered by the reaction color of other substances in the sample. Also the test strips are much less subjective, they provide a clear positive or negative result, and also they are affordable and sensitive!

How can I confirm that my substance is heroin?

After using fentanyl test strips to check for fentanyl, we recommend the following reagents for detecting heroin: Marquis (red/purple), and Froehde (purple).

Is it hard to conduct tests?

The actual process of dropping the reagent onto the sample is easy! What may be difficult is knowing which reagent to begin with, and how to interpret the results. Here at DoseTest we have created the Results App which should make interpreting the results easy! We also have a live chat where you can ask any questions about testing!