Remedies for Dry Cough A dry, non-productive cough can be extremely irritating and uncomfortable, often resulting from an irritation in the throat or upper respiratory tract. Although a dry cough does not produce mucus, it is important to treat it to prevent inflammation and discomfort. In the following, we will explore some natural remedies that can help soothe a dry cough. Remedy 1: Castor Oil and Onion Syrup Castor oil is known for its emollient and anti-inflammatory properties, while onion has antimicrobial and soothing effects on the throat. Combining these two ingredients can provide significant relief for dry coughs by reducing irritation and inflammation.