Corex DX Syrup is a combination medication that is utilized for the treatment of dry cough Its mechanism of action involves reducing the activity of the cough center in the brain thereby providing relief from symptoms like runny nose watery eyes sneezing and throat irritation Corex DX Syrup is composed of two active ingredients namely Chlorpheniramine Maleate and Dextromethorphan Hydrobromide which effectively alleviate dry cough Chlorpheniramine Maleate acts as an antiallergic agent that helps in reducing cough caused by allergies by blocking the effects of histamine a chemical messenger On the other hand Dextromethorphan Hydrobromide functions as a cough suppressant by decreasing the activity of the cough center in the brain To ensure proper usage take this medication as prescribed by your doctor and follow the instructions provided on the label Use a measuring cup to accurately measure the dosage and take it orally It is recommended to shake the syrup well before use You may take Corex DX Syrup with or without food but it is advisable to take it at a fixed time for better results