Alernyl DC Syrup 100ml is a combination medicine used to relieve symptoms of dry cough, allergic reactions, and upper respiratory tract irritation. It typically contains an antihistamine to reduce allergy symptoms such as sneezing, runny nose, and watery eyes, along with a cough suppressant that helps calm the cough reflex. This syrup is commonly used in conditions like common cold, allergic rhinitis, or throat irritation without mucus. It helps improve comfort and sleep by reducing coughing episodes. The medicine should be taken as directed by a healthcare professional. Side effects may include drowsiness, dizziness, or dry mouth.