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. ...

Antitussive effects of ethyl acetate fraction of Terminalia chebula on sulphur dioxide (SO2) gas induced cough have been examined in mice. Safety profile of Terminalia chebula was established by determining LD50 and acute neurotoxicity. The result showed that extract of Terminalia chebula dose dependently suppressed SO2 gas induced cough in mice. Terminalia chebula, after i.p. administration at...

In this study, the activity of the d-opioid receptor subtypeselective agonist, SB 227122, was investigated in a guinea pig model of citric acid-induced cough. Parenteral administration of selective agonists of the d-opioid receptor (SB 227122), m-opioid receptor (codeine and hydrocodone), and k-opioid receptor (BRL 52974) produced dose-related inhibition of citric acid-induced cough with ED50 v...

background: the relaxant and anticholinergic (functional antagonism) effects, histamine h 1 inhibitory effect, and calcium channel blocking effect of nigella sativa have been demonstrated on guinea pig tracheal chains.  several therapeutic effects including anti-asthma and dyspnea have also been ascribed to the seeds of nigella sativa.   objective: to evaluate the antitussive effect of this pla...

Terminalia chebula, a medicinal plant, is widely used in the management of various diseases. As the water extract of its dried ripe fruit is a frequently used preparation, we decided to look for bioactive polysaccharide in this extract. We demonstrate that the obtained polysaccharide fraction, CP, contained a highly branched arabinogalactan protein having a (1 → 3)-, (1 → 6)- and (1 → 3, 6)-lin...

It has been established that Picralima nitida has antitussive effect. This study therefore aimed at determining the possible mode of antitussive and expectorant activity of an ethanolic seed extract of P. nitida (PNE). The muco-suppressant, mast cell stabilization, and the anxiolytic effects of PNE were ascertained using ammonium chloride-induced phenol red secretion in BALB/c mice; compound 48...

1. Dextromethorphan is a widely used antitussive agent which is a non-narcotic codeine analogue. We have investigated whether inhaled administration of dextromethorphan provides antitussive activity in a citric acid induced cough model. 2. Twenty normal subjects underwent repeated cough challenge with 5% citric acid. Subjects were studied on six occasions. Study medication consisted of oral dex...

Several therapeutic effects including hypnotic, antispasmodic, treatment of abdominal and chest pain and strengthening the heart have been described for the flowers of Rosa damascena. North American Indian tribes use a decoction of the roots obtained from the Rosa damascena plant as a cough remedy and to treat eye problem. Therefore, in the present study the antitussive effect of this plant in ...

Cough is the most common complaint for which outpatients in the United States seek medical attention, and yet available therapeutic options for cough lack proven efficacy and are further limited by safety and abuse liabilities. Thus, safe and effective cough suppressants are needed. Recent preclinical studies described the antitussive effects of memantine, an N-methyl-d-aspartate receptor chann...