603556
From Roanoke, Virginia on October 10, 2025
Assumed to be heroin
This is a messy brew of 10 major substances:
- acetaminophen
- caffeine
- lidocaine
- medetomidine
- xylazine
- procaine
- 4-ANPP
- heroin
- fentanyl
- bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate
And we also found traces of dimethyl sulfone (methylsulfonylmethane MSM). 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 = brown, tar, oil/wax
Need free supplies and advice to keep you safe? Find your nearest harm reduction program at harmreduction.org
Major substances in graph:
Peak: 6.3 = acetaminophen
Peak: 6.89 = caffeine
Peak: 7 = lidocaine
Peak: 7.24 = medetomidine
Peak: 7.42 = xylazine
Peak: 7.57 = procaine
Peak: 9.02 = 4-ANPP
Peak: 9.7 = heroin
Peak: 10.12 = fentanyl
Peak: 12.02 = bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate
Method(s): GCMS
Record for Sample 603556 last updated October 17, 2025