Easy to use
Tried & tested
Easy to use
With just a few drops and a few seconds you can identify hundreds of possible substances, protecting yourself and your friends from the dangers of a toxic drug supply.
How it works in 3 steps
Use our app to receive personalised guidance on how to test your sample with your kit.
Just place a drop on your sample and watch the reaction take place.
Key the results into our app to find out what’s actually in your sample.
What our customers think
Your best resource for tests
Fast shipping. The instructions were the easiest to use that I've seen.
Easy to use and great price
I've recommended Dosetest to all of my friends. The kits I got were super easy to use and they helped me on the live chat.
Really quick shipping
Needed to get my tests quickly for the weekend and the entire Dosetest team was super helpful in getting my tests in time.
Clear and straightforward
Got my tests in 2 days, and was able to confirm my MDMA was indeed MDMA in time for the weekend. The tests worked great.
What exactly are Fentanyl Test Strips?
This type of test is called a lateral flow competitive immunoassay.
The mechanism of the test strip as a whole may seem complicated, but each component can be understood!
When the strip is dipped in water, the sample liquid moves up the test strip carrying the sample with it.
Each strip also contains the control particles on the part that is dipped into water. These molecules are there to confirm that the strip is working properly. As the sample and the control move up the test strip, they will arrive at the area where the results are read.
The control line only detects the control molecules, and produces a red colour when it attaches to the control. This means the strip was used properly.
The result line is a bit different. If there is fentanyl or a fentanyl analog present, it will attach to the results line preferentially, blocking the control from creating the red color.
If there is no fentanyl present, the control molecules will also bind to the results line. This is why one line is read as positive and two lines are read as negative!
When will my order arrive?
Is the package discreet?
Orders are shipped either in plain brown boxes or padded envelopes, and the sender is marked simply as “DTEST” with no other information on the package which indicates its contents.
Can I get help when testing?
Do the test strips detect various forms of Fentanyl?
How do I use the test strips?
We recommend two different ways of testing, depending on if you have a solid or liquid sample.
1: Prepare your sample
Pills and powders: If testing a pill, break off a small chunk and crush it as finely as you can. If it’s a powder, chop it up and mix it as best you can. These strips are highly sensitive, so you only need about 50 milligrams (think a couple of grains of salt). Put this into a cup, add 5ml (about a teaspoon) of water and mix them together. Fentanyl dissolves pretty easily, so don’t worry if there is some residue after you’ve stirred it a bit – that won’t affect the results.
(Note: MDMA and methamphetamine can cause false positives. To avoid this, add an extra 4 tsp to the sample so that it is more diluted. IPPH and DPH can also cause false positives, but are far less common).
Liquid: If you’re prepping a shot, do that first – the residue left in the preparation container is all you need. Add about 5ml of water (about a teaspoon), then put the mix into a cup. If it’s in a vial/bottle, shake it a little and put a drop into a cup, then add the teaspoon of water and mix.. If you are testing a pressed tablet or pill, using a clean knife, break off a small part and crush it into a powder. If your substance is already in the form of a powder, mix it as thoroughly as possible.
2: Running your test
Take the strip out of its packaging, then dip the end with the wavy lines into your sample for about 15 seconds. Once that’s done, place it horizontally on a nice clean surface and wait for up to 3 minutes for your results to appear.
3: Interpreting your test
Since there are 2 lines which would either appear or not appear, there are 4 possible results. The line nearer the end that you dipped is the Test line, and the line nearer the handle is the Control line.
Control line visible, Test line invisible: This is a positive result, which indicates that your sample DOES contain fentanyl.
Control line visible, Test line visible: This is a negative result, which indicates that your sample DOES NOT contain fentanyl.
Control line invisible: Regardless of what the Test line does, this means that something has gone wrong and the result is inconclusive – we don’t know if your sample contains fentanyl. We advise repeating the test or, if that isn’t possible, assuming that the sample DOES CONTAIN fentanyl.