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25,316 samples completed from 43 states. Last updated Tuesday, October 27, 2026.
Data Use & Protection Statement
Spectra image for sample 500661

500661

From Wake County, North Carolina on June 14, 2023

Assumed to be heroin

This is a messy brew of 9 major substances:

  • niacinamide
  • xylazine
  • 4-ANPP
  • despropionyl p-fluorofentanyl
  • heroin
  • p-fluorofentanyl
  • fentanyl
  • bromazolam
  • metonitazene

But we found lots of contaminants too, with traces of dimethyl sulfone (methylsulfonylmethane MSM) + diphenhydramine + ethyl 4-ANPP + flualprazolam + phenethyl 4-ANPP + protonitazene. Trace substances in small quantities are usually harmless but can sometimes cause health problems. Unexpected sensations may be due to these. The trace designation indicates the conclusive identification of the substance at a relatively low abundance compared to the sample's primary component(s). A substance is designated as "trace" when the peak height is less than 5% of the height of the most abundant peak detected in the sample.

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 = light brown, powder, chunky

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

Major substances in graph:

Peak: 3.29 = niacinamide

Peak: 5.59 = xylazine

Peak: 7.11 = 4-ANPP

Peak: 7.11 = despropionyl p-fluorofentanyl

Peak: 7.81 = heroin

Peak: 7.94 = p-fluorofentanyl

Peak: 8.12 = fentanyl

Peak: 10.24 = bromazolam

Peak: 12.35 = metonitazene

Method(s): GCMS

Record for Sample 500661 last updated June 23, 2023