Naka Respiratory Essentials - Herbal formulation to support respiratory and bronchial function. Thyme is traditionally used in herbal medicine to help relieve coughs spasmolytic, the symptoms of bronchitis and mucus build-up of the upper respiratory tract. Marshmallow is traditionally used in herbal medicine as a demulcent to relieve the irritation associated with dry cough. Fenugreek is traditionally used in herbal medicine as an expectorant to help relieve excess mucous.