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uncountable
(pharmacology) A potent α2-adrenergic agonist used for sedation, anesthesia, and analgesia in large mammals; it is also misused as an adulterant in street drugs. quotations
The user had a hunch that there was fentanyl in the powder but feared the presence of xylazine, a dangerous animal tranquilizer that can leave oozing wounds on limbs.
2022 December 24, Noah Weiland, “A High-Tech Strategy for Keeping Drug Users Safe: Analyzing Their Fentanyl”, in The New York Times
In her shattered Philadelphia neighborhood, and increasingly in drug hot zones around the country, an animal tranquilizer called xylazine — known by street names like “tranq,” “tranq dope” and “zombie drug” — is being used to bulk up illicit fentanyl, making its impact even more devastating.
2023 January 7, Jan Hoffman, “Tranq Dope: Animal Sedative Mixed With Fentanyl Brings Fresh Horror to U.S. Drug Zones”, in The New York Times