Plant case:
In Germany, physicians prescribe a medicinal product containing essential oil (Gelomyrtol) as a laxative and mucolytic sputum for patients with acute and chronic bronchitis and sinusitis. Chronic airway obstruction has been proven. The essential oil contains limonene, cineole, and alpha-pinene. Monoterpenes and quasi-terpenes in essential oils have antibacterial, antifungal and antiseptic effects. In animal in vivo, the essential oils of the case plants, thyme and artichoke have completely neutralized the avian influenza and Newcastle virus to a dilution of 1/256.

Menthol:
Menthol has a surfactant-like effect in in vitro studies and has reduced surface tension between climates in vivo, thereby improving lung compliance. The results of animal studies indicate the effect of menthol as an antitussive in coughs caused by chemicals. Based on existing experience, menthol helps to facilitate breathing during a cold. This is indicated by the general use of menthol-containing products such as topical nasal decongestants, lozenges, ointments and incense.