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Systematic (IUPAC) name
Clinical data
AHFS/Drugs.com International Drug Names
7361-61-7 YesY
PubChem CID 5707
IUPHAR ligand 523
ChemSpider 5505 N
KEGG D08683 YesY
Chemical data
Formula C12H16N2S
 N (what is this?)  (verify)

Xylazine is an analogue of clonidine and an agonist at the α2 class of adrenergic receptor; it is used for sedation, anesthesia, muscle relaxation, and analgesia in animals such as horses, cattle and other non-human mammals.[1] Veterinarians also use xylazine as an emetic, especially in cats.[2]

In veterinary anesthesia, xylazine is often used in combination with ketamine. It is sold under many brand names worldwide, most notably the Bayer brand name Rompun.[1] The drug interactions vary with different animals.[3][4][5]

It has become a drug of abuse, particularly in Puerto Rico,[6] where it is diverted from stocks used by equine veterinarians and used as a cutting agent for heroin.[7]


  1. ^ a b Xylazine at drugs.com
  2. ^ by Patricia M. Dowling & Johann (Hans) Coetzee for the Merck Manual. Last full review/revision March 2012 Drugs to Control or Stimulate Vomiting (Monogastric)
  3. ^ Aithal, H. P., Amarpal K. Pratap, and G. R. Singh. "Clinical effects of epidurally administered ketamine and xylazine in goats." Small Ruminant Research 24.1 (1997): 55-64.
  4. ^ Haskins, S. C., J. D. Patz, and T. B. Farver. "Xylazine and xylazine-ketamine in dogs." American journal of veterinary research 47.3 (1986): 636-641.
  5. ^ Muir, W. W., R. T. Skarda, and D. W. Milne. "Evaluation of xylazine and ketamine hydrochloride for anesthesia in horses." American journal of veterinary research 38.2 (1977): 195-201.
  6. ^ Torruella, R.A. "Xylazine (veterinary sedative) use in Puerto Rico." Substance Abuse Treatment Prevention Policy, April 11, 2011, 6:7. doi:10.1186/1747-597X-6-7
  7. ^ Reyes, J.C. et. al. "The emerging of xylazine as a new drug of abuse and its health consequences among drug users in Puerto Rico." Journal of Urban Health, June 2012, 89 (3): 519-526. doi:10.1007/s11524-011-9662-6

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