Xylazine is a structural analog of clonidine and an α₂-adrenergic receptor agonist, sold under many trade names worldwide, most notably the Bayer brand name Rompun, as well as Anased, Sedazine and Chanazine. From Wikipedia
Researchers and healthcare professionals call for action as the powerful animal tranquilizer xylazine, known as 'tranq', penetrates the UK's illegal drug market.