Antitussive effect of the GABA-agonist baclofen.

Abstract:

BACKGROUND:gamma-Aminobutyric acid (GABA) is a central inhibitory neurotransmitter that also exists in peripheral tissues, including the lung. The GABA-agonist baclofen has been shown, in animal studies, to inhibit cough via a central mechanism, but has not been investigated in humans (to our knowledge). STUDY OBJECTIVE:To evaluate the antitussive effect of baclofen in normal human subjects. DESIGN:Randomized, double-blind, placebo-controlled study. SETTING:Academic medical center. PARTICIPANTS:Twenty healthy, adult volunteers. INTERVENTIONS:Subjects underwent cough challenge with inhaled capsaicin before and after a 14-day course of baclofen, 10 mg three times daily, or placebo. Capsaicin cough threshold (C5) was defined as the concentration of inhaled capsaicin inducing five or more coughs. RESULTS:Subjects receiving baclofen (n=10) demonstrated a significant elevation of capsaicin cough threshold compared with placebo subjects (n=10). Mean delta log C5 after treatment was 0.48+/-0.19 (SEM) for the baclofen group, and -0.06+/-0.12 for the placebo group (p=0.024). Six of 10 subjects receiving baclofen, but none of the 10 subjects receiving placebo, demonstrated a fourfold or greater increase in capsaicin cough threshold (p=0.0054). CONCLUSION:The antitussive activity of low-dose, oral baclofen demonstrated in this study supports further investigation of this drug, or other GABA-agonists, for a potential therapeutic role in the treatment of pathologic cough.

journal_name

Chest

journal_title

Chest

authors

Dicpinigaitis PV,Dobkin JB

doi

10.1378/chest.111.4.996

subject

Has Abstract

pub_date

1997-04-01 00:00:00

pages

996-9

issue

4

eissn

0012-3692

issn

1931-3543

pii

S0012-3692(15)46926-0

journal_volume

111

pub_type

临床试验,杂志文章,随机对照试验

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