Properties and actions:thymotal increases hydration of the respiratory system by increasing water content of mucous to liquefy thick mucous, and stimulates the mucociliary apparatus. thymol and carvacrol in thymotal have a broad spectrum antibacterial activity by enhancing bacterial membrane perforation. flavonoids in thymotal inhibit calcium influx of the smooth muscles leading to smooth muscle relaxation.indications: acute and chronic bronchitis upper respiratory tract infections asthmatic bronchitis