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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 819446

819446

From Grand Rapids, Michigan on June 2, 2026

Assumed to be fentanyl

4 major substances detected:

  • caffeine
  • diphenhydramine
  • 4-ANPP
  • fentanyl

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.

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 = gray, fine, powder

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

Major substances in graph:

Peak: 6.967 = caffeine

Peak: 7.098 = diphenhydramine

Peak: 9.177 = 4-ANPP

Peak: 10.342 = fentanyl

Method(s): GCMS

Record for Sample 819446 last updated June 18, 2026