This document provides information on xylazine, a non-opioid veterinary tranquilizer used as an additive in illicit drug supplies, notably in combination with heroin and fentanyl. It discusses the effects of xylazine use, including sedation and potential risks such as hypotension and bradycardia. The document also emphasizes harm reduction interventions for individuals who may encounter xylazine in the drug supply, including the use of naloxone for responding to overdoses and the importance of wound identification and treatment.