Drug checking saves lives

Know what's in it before it's in you.

Fentanyl, xylazine, nitazenes, and designer benzos are being cut into pills and powders to stretch supply or fake potency. Most have never been tested on humans, and naloxone (Narcan) can't reverse sedation from xylazine or benzos. Our strips give you an answer in minutes.

Shop Test Strips See how they work
  • 99% accuracy*
  • ~5 min results
  • No urine needed

Drug Checking Strips

Our newest and most popular products. Test pills, powders, and residue, not your body.

Best seller

Fentanyl Test Strips

10-pack

Detects fentanyl and many fentanyl analogs in pills, powders, and residue. Results in about 5 minutes.

$12.00
New

Xylazine Test Strips

10-pack

Detects xylazine ("tranq"), a veterinary sedative that naloxone does not reverse and that causes severe wounds.

$15.00
Emerging threat

Nitazene Test Strips

10-pack

Screens for nitazenes, a class of synthetic opioids that can be far stronger than fentanyl.

$18.00

Benzodiazepine Test Strips

10-pack

Flags benzos, including novel "designer" benzos like bromazolam showing up in counterfeit pills and dope.

$15.00
Save 13%

Triple Check Combo

10 fentanyl + 10 xylazine + 10 nitazene

Our most complete kit for checking opioid supply. Includes mixing cups and a step-by-step card.

$39.00
Coming soon

Medetomidine Test Strips

10-pack

A sedative increasingly replacing xylazine in some regions. Join the waitlist to be notified.

How to Test in 4 Steps

No lab, no urine sample. Just a little water and a few minutes.

  1. 1

    Crush

    Crush the whole pill if you can. Fentanyl isn't evenly spread, so testing just a corner can miss it.

  2. 2

    Dissolve

    Add the sample to a clean container with water as listed on the package insert. Some drugs need extra water to avoid false positives.

  3. 3

    Dip

    Dip the wavy end of the strip into the liquid for about 15 seconds. Don't go past the max line.

  4. 4

    Read

    Lay flat and wait about 5 minutes. Two lines means not detected; one line means detected.

A negative result doesn't mean "safe." Strips only check for what they're designed to detect, and dangerous substances can be unevenly mixed. Never use alone, start low and go slow, and keep naloxone nearby.

New: GC/MS Lab Analysis

Know the exact chemicals and their percentages.

Strips tell you if one specific substance is there. A GC/MS test (gas chromatography–mass spectrometry, the gold standard used by forensic labs) tells you exactly what's in your sample and how much of each. Find out definitively what's in your drugs from a world-renowned U.S. lab, starting at just $20.

  • Identifies every detectable compound, not just one
  • Shows the percentage of each chemical in your sample
  • Catches new adulterants before strips exist for them
  • Anonymous: results are tied to a sample code, not your name
  • Analyzed by U.S.-based labs only

Single Test

$20

1 GC/MS analysis

Best value

6-Pack

$100

Just $16.67 per test, save $20

Example report Sample #GX-48213

Sold as: "Oxycodone 30mg" pressed pill

  • Acetaminophen
    71.4%
  • Fentanyl
    2.1%
  • Xylazine
    8.3%
  • Mannitol (filler)
    18.2%
  • Oxycodone
    Not detected

GC/MS testing: how we compare

gnarcotix.xyzU.S. labs
$20
6-pack pricePer test
$16.67
Typical lab servicesSome based overseas
$125+

Save 84% or more per test, and up to 87% with the 6-pack.

  1. 1
    Order a kit

    Get a prepaid mailer, sample bag, and a unique anonymous sample code.

  2. 2
    Send a tiny sample

    Only a few milligrams are needed. Seal it, label it with your code, and mail it.

  3. 3
    Get your results

    Look up your code online once the lab finishes. Typical turnaround: 5 to 10 business days.

Standard Urine Drug Tests

FDA-cleared cups for home, workplace, and clinical screening.

6panel

6-Panel Urine Cup

THC, COC, OPI, AMP, mAMP, PCP.

$6.00 per cup
8panel

8-Panel Urine Cup

6-panel plus BZO and MDMA.

$8.00 per cup
10panel

10-Panel Urine Cup

8-panel plus BAR and MTD (methadone).

$10.00 per cup
12panel

12-Panel Urine Cup

Most complete

10-panel plus OXY and BUP. Adulteration strips built in.

$12.00 per cup

Bulk pricing available for 25+ cups. Contact us for clinic and workplace orders.

More Testing & Safety Gear

Everything else you need to check your supply and stay safer.

Reagent Kit (Marquis, Mecke, Simon's)

Color-change reagents to help identify what a substance is, not just what it contains.

$34.00 kit

6-Panel Saliva Test

Oral fluid swab with results in under 10 minutes.

$9.00 per test

Milligram Scale (0.001g)

Accurate small-sample measurement for proper strip dilution.

$29.00 each
Carry this

Naloxone Nasal Spray

Reverses opioid overdose. Still give it if opioids may be involved, even if xylazine or benzos are present too.

$45.00 2-pack

The safest test is the one you never need.

Testing reduces risk, but it doesn't remove it. The surest way to avoid an overdose, or a positive result, is not to use. If you're ready to cut back or stop, free and confidential help is available any time.

SAMHSA National Helpline

1-800-662-4357

Free, confidential treatment referrals 24/7.

Never Use Alone Hotline

1-800-484-3731

If you use, someone stays on the line and sends help if you stop responding.

988 Lifeline

Call or text 988

Crisis and mental health support, any time.

Overdose?

Call 911

Give naloxone, do rescue breathing, and stay with them. Many states have Good Samaritan laws.