Duro-Tuss Relief Dry Cough

Duro-tuss relief dry cough liquid is a herbal formulation. Althaea officinalis (marshmallow) has been traditionally used in western herbal medicine to help relieve throat irritation and an associated dry, unproductive cough. Duro-tuss relief dry cough liquid is a herbal formulation. Althaea officinalis (marshmallow) has been traditionally used in western herbal medicine to help relieve throat irritation and an associated dry, unproductive cough. No added sugar. Free from: artificial colours, gluten and lactose. Take back control of your cough no added sugar free from: artificial colours, gluten and lactose non-drowsy herbal formulation great taste.