Costus DX Syrup is a combination antitussive and antihistamine oral syrup used for the symptomatic relief of dry, irritating cough associated with cold and allergic conditions. It helps suppress the cough reflex while also reducing allergy-related symptoms such as sneezing, runny nose, and throat irritation.

This formulation contains Dextromethorphan Hydrobromide and Chlorpheniramine Maleate, which work together to provide effective relief from dry cough and upper respiratory tract discomfort.

Dextromethorphan acts on the cough center in the brain to reduce the urge to cough, while Chlorpheniramine helps control allergic responses by blocking histamine activity, thereby relieving symptoms like sneezing and nasal irritation.