Durotuss Dry Cough Liquid is an herbal formulation. Althaea officinalis (Marshmallow) has been traditionally used in Western herbal medicine to help relieve throat irritation and an associated dry, unproductive cough. - Flavour: Blackberry and Vanilla - Take back control of your cough. - No added sugar - FREE FROM: Artificial colours, gluten, and lactose.Non-drowsy.Herbal formulation. - Great taste.