Kokilaksha (Asteracantha longifolia, also known as Hygrophila auriculata) is a medicinal plant commonly used in Ayurveda. Its application in the treatment of cough has roots in traditional Indian medicine, where it is often included in polyherbal formulations intended for respiratory health. Ayurvedic texts attribute demulcent, expectorant, and anti-inflammatory properties to Kokilaksha, which theoretically support its use in easing cough and throat irritation. However, these uses are largely based on empirical tradition and mentions in classical Ayurvedic literature rather than on contemporary clinical trials.

Scientific studies on Kokilaksha have focused primarily on its diuretic, hepatoprotective, and aphrodisiac properties. There is a lack of robust preclinical or clinical research specifically evaluating its efficacy for cough or respiratory conditions. Some in vitro studies suggest possible anti-inflammatory and antimicrobial activities, which could theoretically have a role in respiratory health, but these findings are preliminary and not directly linked to cough management in human subjects.

In summary, the use of Kokilaksha for cough is justified by its place in traditional medicine, but it is not supported by modern clinical evidence. The overall quality and quantity of evidence for this use are limited.