W-18 is a widely mischaracterized drug due to inaccurate reports from the media and law enforcement. The way in which it’s been discussed serves as an example of how uninformed most drug-related journalism is.

Despite being called a highly potent opioid, W-18 doesn’t function as an opioid. In fact, it appears to have few actions in the body and cannot be compared to drugs like fentanyl and morphine.

W-18 = 4-chloro-N-[(2Z)-1-[2-(4-nitrophenyl)ethyl]piperidin-2-ylidene]benzene-1-sulfonamide


Not currently available due to a lack of information.


Not currently available due to a lack of information.


(2016) Pharmacology of W-18 and W-15

(2016) Proposal regarding the scheduling of W-18 under the Controlled Drugs and Substances Act and its Regulations

(2015) EMCDDA-Europol 2014 Annual Report on the implementation of Council Decision 2005/387/JHA

  • Chaplin Phillips

    Thank you for taking the time to ensure that accurate and truthful information be stated when discussing or reporting on drugs. This drug appears to be very dangerous, I’m not arguing that, but I work in the pharmaceutical industry and it’s very frustrating seeing reporters and law enforcement inaccurately reporting this information.