Document Detail

Efficacy of salmeterol xinafoate in horses with recurrent airway obstruction.
MedLine Citation:
PMID:  11417742     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine the onset, magnitude, and duration of bronchodilation after administration of aerosolized salmeterol xinafoate in horses with recurrent airway obstruction. DESIGN: Randomized controlled study ANIMALS: 6 horses with recurrent airway obstruction. Procedure Horses received aerosolized salmeterol (210 microg) or no treatment, using a crossover design. Salmeterol was administered, using a mask designed for aerosol delivery in horses. Subjective rating of airway obstruction (RAO), maximal change in pleural pressure (deltaPplmax), and pulmonary resistance (RL) were determined at baseline; 5, 15, and 30 minutes; and 1, 2, 4, 6, 8, 10, and 12 hours after administration of salmeterol and in horses that did not receive treatment. RESULTS: The deltaPpl and RL were improved 15 minutes through 6 hours after administration of salmeterol, compared with values obtained from horses receiving no treatment. The RAO was improved 15 minutes through 2 hours after administration of salmeterol. The maximal response to salmeterol was evident 30 to 60 minutes after administration and was characterized by a 59 + 19% decrease in deltaPpl and a 56 +/- 13% decrease in RL. The deltaPpl and RL were not different from baseline values 8 hours after salmeterol administration. CONCLUSIONS AND CLINICAL RELEVANCE: Duration of action of salmeterol in these horses was approximately 6 hours. Maximal bronchodilation was somewhat delayed (30 to 60 minutes), and the magnitude of response was similar to that of short-acting beta2-adrenergic agonists. Salmeterol provides moderately sustained bronchodilation in horses with recurrent airway obstruction and may be an effective drug for long-term control of this condition.
S L Henrikson; B R Rush
Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Journal of the American Veterinary Medical Association     Volume:  218     ISSN:  0003-1488     ISO Abbreviation:  J. Am. Vet. Med. Assoc.     Publication Date:  2001 Jun 
Date Detail:
Created Date:  2001-06-21     Completed Date:  2001-07-12     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  7503067     Medline TA:  J Am Vet Med Assoc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1961-5     Citation Subset:  IM    
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan 66506-5606, USA.
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MeSH Terms
Administration, Inhalation
Airway Obstruction / drug therapy,  veterinary*
Albuterol / analogs & derivatives*,  pharmacokinetics,  pharmacology,  therapeutic use*
Bronchodilator Agents / pharmacokinetics,  pharmacology,  therapeutic use*
Cross-Over Studies
Horse Diseases / drug therapy*
Lung / drug effects
Treatment Outcome
Reg. No./Substance:
0/Bronchodilator Agents; 18559-94-9/Albuterol; 89365-50-4/salmeterol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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