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Equine veterinary journal1988; 20(5); 364-367; doi: 10.1111/j.2042-3306.1988.tb01546.x

Cardiorespiratory and sedative effects of a combination of acepromazine, xylazine and methadone in the horse.

Abstract: Cardiorespiratory and sedative effects of a combination of acepromazine, xylazine and methadone were studied in the horse. Acepromazine and xylazine produced cardiovascular effects whereas methadone mainly affected respiratory rate. Decreases in heart rate, arterial blood pressure and respiratory rate were seen. Sedation was superior to that of acepromazine, xylazine or a combination of these. No serious side effects were seen.
Publication Date: 1988-09-01 PubMed ID: 3181120DOI: 10.1111/j.2042-3306.1988.tb01546.xGoogle Scholar: Lookup
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

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This study explores the impact of a blend of acepromazine, xylazine, and methadone on the horse’s cardiorespiratory system and sedative properties. The results reflect that this mixture produced superior sedation effects and influenced the heart and respiratory rates without causing serious side effects.

Combination of Drugs Studied and Their Effects

  • The research focuses on three drugs – acepromazine, xylazine, and methadone – and their combined effect when administered to horses.
  • Acepromazine and xylazine had noticeable cardiovascular effects, influencing heart function and blood pressure.
  • On the other hand, methadone primarily affected the respiratory rate, altering the breathing pattern of the horse.

Cardiorespiratory Impact

  • The combination of all three drugs resulted in a decrease in heart rate, arterial blood pressure, and respiratory rate among the horses studied.
  • This implies that the drugs together had a substantial impact on both the cardiovascular (heart and blood vessels) and respiratory (breathing) systems.

Sedative Influence

  • The research found that the level of sedation produced by the combination of all three drugs was exceptionally superior compared to using acepromazine, xylazine, or a mix of the two.
  • Therefore, the study suggests that this combined drug regimen can provide more effective sedation in equine patients.

Side Effects

  • Importantly, despite the observable impacts on the cardiorespiratory system and sedative properties, the study did not record any severe side effects from administering this combination of drugs.
  • This potentially indicates a level of safety in using this particular combination of drugs for sedation and possible cardiorespiratory control in horses.

Cite This Article

APA
Nilsfors L, Kvart C, Kallings P, Carlsten J, Bondesson U. (1988). Cardiorespiratory and sedative effects of a combination of acepromazine, xylazine and methadone in the horse. Equine Vet J, 20(5), 364-367. https://doi.org/10.1111/j.2042-3306.1988.tb01546.x

Publication

ISSN: 0425-1644
NlmUniqueID: 0173320
Country: United States
Language: English
Volume: 20
Issue: 5
Pages: 364-367

Researcher Affiliations

Nilsfors, L
  • Department of Clinical Radiology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Kvart, C
    Kallings, P
      Carlsten, J
        Bondesson, U

          MeSH Terms

          • Acepromazine / administration & dosage
          • Acepromazine / pharmacology
          • Animals
          • Blood Pressure / drug effects
          • Cardiovascular System / drug effects
          • Female
          • Heart Rate / drug effects
          • Horses / physiology
          • Injections, Intravenous
          • Male
          • Methadone / administration & dosage
          • Methadone / blood
          • Methadone / pharmacology
          • Respiration / drug effects
          • Thiazines / pharmacology
          • Xylazine / administration & dosage
          • Xylazine / pharmacology

          Citations

          This article has been cited 3 times.
          1. Nannarone S, Giannettoni G, Laurenza C, Giontella A, Moretti G. Methadone or Butorphanol as Pre-Anaesthetic Agents Combined with Romifidine in Horses Undergoing Elective Surgery: Qualitative Assessment of Sedation and Induction.. Animals (Basel) 2021 Aug 31;11(9).
            doi: 10.3390/ani11092572pubmed: 34573538google scholar: lookup
          2. Nyman G, Marntell S, Edner A, Funkquist P, Morgan K, Hedenstierna G. Effect of sedation with detomidine and butorphanol on pulmonary gas exchange in the horse.. Acta Vet Scand 2009 May 7;51(1):22.
            doi: 10.1186/1751-0147-51-22pubmed: 19422714google scholar: lookup
          3. Marntell S, Nyman G. Effects of additional premedication on romifidine and ketamine anaesthesia in horses.. Acta Vet Scand 1996;37(3):315-25.
            doi: 10.1186/BF03548097pubmed: 8996876google scholar: lookup