This is a drug made to look like Oxycontin, buyers believe it is Fentanyl, but after studies found it to be 100 times stronger than Fentanyl. However, there are no studies proving that this is in fact an opiate. The drug was created by Canadian chemists in 1981. Currently Narcan Pens are being used to reverse the effects of an opiate overdose; however it has not been proven to be effective with W-18. I This may be because there is still question if W-18 is a true opioid and the chemical make-up is different than any other opioid. The W reportedly comes from the last name of one of the originating chemists and the 18 from it being the 18th chemical in the patent. W-18 is not yet illegal in the U.S. Forbes reports a Florida man was arrested for sales of others drugs was found to also have 2½ pounds of W-18. It sounds as if we will be hearing more about this drug in the future, so keep a look out.
Streetdrugs.org Forbes April 30, 2016