In her shattered Philadelphia community, and more and more in drug hot zones throughout the region, an animal tranquilizer referred to as xylazine — recognized by street names like “tranq,” “tranq dope” and “zombie drug” — is being used to bulk up illicit fentanyl, making its impression much more devastating. https://socialbuzzfeed.com/story3913386/what-does-xylazine-hcl-for-sale-in-europe-mean