COSTUS-D JUNIOR SYRUP with powerful formulation of Dextromethorphan Hydrobromide 5mg , Chlorpheniramine maleate 1mg , Phenylephrine hydrochloride 2.5mg is acts as a cough suppressant to reduce persistent dry cough, Chlorpheniramine Maleate is an antihistamine that helps relieve sneezing, runny nose, and watery eyes caused by allergies, while Phenylephrine Hydrochloride is a nasal decongestant that reduces nasal congestion by shrinking swollen blood vessels in the nasal passages.