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Effectiveness of proton pump inhibitor in unexplained chronic cough.

Authors
 Hye Jung Park  ;  Yoo Mi Park  ;  Jie-Hyun Kim  ;  Hye Sun Lee  ;  Hyung Jung Kim  ;  Chul Min Ahn  ;  Min Kwang Byun 
Citation
 PLoS One, Vol.12(10) : e0185397, 2017 
Journal Title
 PLoS One 
Issue Date
2017
MeSH
Adult ; Aged ; Chronic Disease/drug therapy ; Cough/drug therapy ; Cough/physiopathology ; Female ; Gastroesophageal Reflux/chemically induced ; Gastroesophageal Reflux/pathology ; Humans ; Male ; Middle Aged ; Proton Pump Inhibitors/administration & dosage ; Proton Pump Inhibitors/adverse effects ; Treatment Outcome
Abstract
BACKGROUND: Current guidelines recommend that patients with unexplained chronic cough undergo empirical proton pump inhibitor (PPI) treatment, but scientific evidence for this treatment is lacking. We investigated the effectiveness and appropriate dose of PPI therapy in chronic cough. METHODS: We included 27 patients with unexplained chronic cough after excluding subjects with positive response to postnasal drip medication. Subjects were randomized to a placebo, standard, and high dose of PPI groups with blinding. The drug or placebo was administered orally for 8 weeks, and the Leicester Cough Questionnaire (LCQ) score and visual analogue scale (VAS) scores were collected. RESULTS: The LCQ score in the PPI group significantly improved from 0 weeks (11.4 ± 1.4) to 4 weeks (14.8 ± 1.4) and to 8 weeks (17.1 ± 1.4), whereas that in the placebo group did not improve from 0 weeks (13.7 ± 1.1) to 8 weeks (11.8 ± 1.4); the difference between the 2 groups was significant (P < 0.001). In subgroup analysis according to reflux, significant improvements in the LCQ score were observed in the PPI group regardless of reflux (P < 0.001 in the reflux group and P < 0.001 in the no reflux group, respectively; P = 0.188 between the 2 groups). In addition, improvements in LCQ and VAS scores between the standard- and high-dose PPI groups were not significantly different; however, adverse reactions were induced by only the high dose (16.7%). CONCLUSIONS: The results of this pilot study support the empirical use of the standard dose of PPI for 8 weeks in patients suffering from unexplained chronic cough regardless of whether reflux is present.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/160969
DOI
10.1371/journal.pone.0185397
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원)
Yonsei Authors
김지현(Kim, Ji Hyun) ; 김형중(Kim, Hyung Jung) ; 박유미(Park, Yoo Mi) ; 박혜정(Park, Hye Jung) ; 변민광(Byun, Min Kwang) ; 안철민(Ahn, Chul Min) ; 이혜선(Lee, Hye Sun)
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