Zescoryl D Syrup is used for relieving cough, cold, nasal congestion, and allergic symptoms. It is formulated with a combination of Cetirizine, Dextromethorphan Hydrobromide, and Phenylephrine that work together to provide effective respiratory relief. Cetirizine, an antihistamine, helps reduce sneezing, a runny nose, and watery eyes by blocking histamine action. Dextromethorphan Hydrobromide acts as a cough suppressant, calming the cough reflex in the brain to reduce persistent coughing. Phenylephrine, a nasal decongestant, relieves a blocked nose and improves breathing by constricting the nasal blood vessels. Together, these ingredients help manage symptoms of the common cold, allergies, and throat irritation, promoting easier breathing and overall comfort.