Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Piper chaba, also known as "Chui Jhal" or "long pepper," is traditionally used in various Asian systems of medicine, especially in Ayurvedic and traditional Thai medicine, as a remedy for respiratory ailments, including coughs—sometimes specifically for spastic or persistent coughs. Traditional texts and ethnobotanical surveys describe its use in herbal formulations aimed at relieving symptoms of coughs, colds, and bronchitis. The plant is believed to exert expectorant and bronchodilatory effects, likely due to its pungent principles (such as piperine) and essential oils, which are thought to soothe the respiratory tract.

However, while animal studies and in vitro research have indicated some antitussive (cough-suppressing) and anti-inflammatory properties of various Piper species (including Piper longum and Piper chaba), robust clinical evidence in humans is lacking. The bulk of its use for cough, including spastic cough, is therefore justified primarily by tradition and anecdotal reports rather than by well-controlled scientific trials. The evidence rating is 2, reflecting the presence of preliminary pharmacological studies and strong traditional use, but an absence of high-quality human clinical data specifically for spastic cough.

In summary, Piper chaba is traditionally used for spastic cough, supported by historical and ethnomedicinal reports, but scientific validation remains limited.

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