Costus LD Syrup is a combination antitussive and antihistamine oral syrup used for the effective relief of dry, irritative cough associated with allergies and upper respiratory tract conditions. It helps suppress the cough reflex while also reducing allergic symptoms such as sneezing, runny nose, throat irritation, and watery eyes.

This formulation contains Chlorpheniramine Maleate and Levodropropizine, which work together to provide dual action relief. Levodropropizine acts centrally to suppress the cough reflex, while Chlorpheniramine Maleate blocks histamine release, thereby reducing allergic responses and associated discomfort.