Cobold-D (Sugar Free) Syrup is a combination of different chemicals that work together for providing relief from congestion, shortness of breath, and allergies. It is formulated using dextromethorphan hydrobromide, phenylephrine hydrochloride, and chlorpheniramine maleate as active compounds. This syrup works by suppressing cough, relieving nasal congestion, healing sinus infection, and assisting in easy breathing. Cobold-D (Sugar Free) Syrup also comprises antihistamines that block certain chemical messengers that are responsible for sinus congestion. It also possesses antitussive and vasoconstricting property. This syrup also provides relief from runny & itching nose, watery eyes, and sinus pressure.