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22,245 samples completed from 42 states. Last updated Thursday, June 18, 2026.
Data Use & Protection Statement
Spectra image for sample 819531

819531

From Passaic, New Jersey on June 2, 2026

Assumed to be heroin, fentanyl

4 major substances detected:

  • medetomidine
  • procaine
  • 4-ANPP
  • fentanyl

And we also found traces of lidocaine + acetaminophen + xylazine. Trace substances in small quantities are usually harmless, but can sometimes cause health problems. Unexpected sensations may be due to these.

Fentanyl is potent and the amount changes by batch. If you weren't expecting it, consider getting test strips online or from a harm reduction program. Carry naloxone (Narcan) to reverse overdoses. Don't use alone so someone can help if you go out.

Xylazine causes serious skin problems. These can happen anywhere on the body and don't heal quickly. And, xylazine can come on stronger than traditional dope and knock you out, so be mindful of your surroundings. It's best to avoid dope with xylazine. You might need medical attention to prevent long-term damage.

There are a lot of different substances in this sample. We don't know the harms that some of these can cause. Be careful and be prepared for unexpected reactions.

Looks = white, chunky, powder

Need free supplies and advice to keep you safe? Find your nearest harm reduction program at harmreduction.org

Major substances in graph:

Peak: 7.36 = medetomidine

Peak: 7.69 = procaine

Peak: 9.2 = 4-ANPP

Peak: 10.35 = fentanyl

Method(s): GCMS

Record for Sample 819531 last updated June 11, 2026