 | Health Canada is seeking stakeholder comments on a proposal to add U-47700 to the Controlled Drugs and Substances Act. 'Grey Death' — named for its resemblance to concrete powder — is a combination of U-47700 and opioids like heroin, fentanyl and carfentanil. The government says U-47700 was detected in at least 254 law enforcement seizures identified by Health Canada in 2016. |  |
 | U-47700 was initially developed as a potential pharmaceutical ingredient in the late 1970s. It was never developed for use as a medicinal drug, and has no known legitimate use. The government also says more than 40 reports of fatal and non-fatal overdoses indicate U-47700 is being used as a recreational drug in Canada and around the world. From April to June 2016, three non-fatal overdoses reportedly associated with U-47700 occurred in Canada. |  |
