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Pack of 5
$37.50 per kit ($7.50 per strip)


Product Information
  • Product Code: XYL-18S2-5K
  • Quantity: 5 Tests/ Kit
  • Sample: Liquid / Powder
  • Format: Strip
  • Sensitivity: 1000 ng/ml
  • Specificity: Xylazine
  • Accuracy: > 96.9%
  • Time-to-Result: 60 seconds*
  • Storage Condition: 2-30°C/36-86°F
  • Test Principle: Lateral Flow Immunoassay
  • 5 Individually packaged test strips
  • 5 Plastic test tubes with extraction buffer solution
  • 5 Swabs
  • Tube stand
  • Result interpretation card
  • Product insert


The Rapid Response™ Xylazine Test Strip Kit (Liquid / Powder) is a rapid visual immunoassay for the qualitative, presumptive detection of xylazine in suspicious substances (liquids or powders) at the cut-off concentration of 1000 ng/mL. The kit contains additional materials required to test liquid or powder samples for the presence of xylazine, including: strips, collection swabs, and prefilled liquid buffer tubes. For forensic use only. Not an IVD.

Xylazine (colloquially known as tranq/ tranq dope) is a non-opioid tranquilizer used as a sedative, analgesic, and muscle relaxant used in veterinary medicine for animals including horse and cattle[1],[3]. Recently, it has commonly been encountered in the recreational drug supply, most commonly in opioid “dope” (e.g., fentanyl, heroin)[2]. Combining xylazine with other drugs that cause central nervous system depression compounds the sedative effects and can increase the risk of overdose and death[2].

  • Easy to use with detailed instructions for testing both liquid and powder samples
  • Results interpretation printed on every pouch
  • Built-in procedural control on every strip
  • Full kit with the materials required to test drug samples

* A negative result can be interpreted as soon as both the test (T) and control (C) lines appear. A positive result can be interpreted once the control line has appeared and the background has cleared to white, typically by 60 seconds. Do not read results after 10 minutes.

Philadelphia Department of Public Health found the BTNX Inc. Xylazine Test Strip’s performance to be deemed acceptable for drug checking purposes. Read the article here.

Read our Xylazine flyer here.

Instructions for Use for Rapid Response Xylazine Test Strip (Liquid / Powder)



[1] GREENE, S.A. and THURMON, J.C. (1988), Xylazine – a review of its pharmacology and use in veterinary medicine. Journal of Veterinary Pharmacology and Therapeutics, 11: 295-313.

[2] Reyes, J.C., Negrón, J.L., Colón, H.M. et al. The Emerging of Xylazine as a New Drug of Abuse and its Health Consequences among Drug Users in Puerto Rico. J Urban Health 89, 519–526 (2012).

[3] Baselt RC. Disposition of Toxic Drugs and Chemicals in Man. 2nd ed. Davis: Biomedical Publications; 1982.

  • The test device is NOT intended to determine the purity, composition, or if the substance being examined is safe to use.
  • A positive or negative test result is NOT an indication that the substance being examined is safe to use. Many factors come into play when examining the samples, including but not limited to mixture of multiple substances, solubility, and pH of the sample.
  • BTNX Inc. does not encourage the use, supply, or production of illegal drugs or controlled substances in any way. The device is intended for harm reduction purposes. Follow the advice of your local harm reduction or public health agency.
  • Not for testing Cocaine.
  • There is a possibility that technical or procedural errors as well as other substances and factors may interfere with the Rapid Response™ Xylazine Test Strip (Liquid / Powder) and cause false results.
  • A positive result indicates the presence of xylazine only and does not indicate quantity.
  • A negative result does not at any time rule out the presence of xylazine, as they may be present below the minimum detection level of the test.
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