This combination of Dextromethorphan HCl (10 mg), Phenylephrine HCl (5 mg), and Chlorpheniramine Maleate (2 mg) is designed to relieve symptoms associated with colds, allergies, and cough. Dextromethorphan HCl is a cough suppressant that acts on the brain to reduce the urge to cough, providing relief from dry and persistent coughs. Phenylephrine HCl is a nasal decongestant that constricts blood vessels in the nasal passages, reducing congestion and making breathing easier. Chlorpheniramine Maleate is an antihistamine that alleviates allergy symptoms such as sneezing, runny nose, and itching. Together, these ingredients effectively address multiple symptoms, including cough, congestion, and allergies, to improve comfort and respiratory relief.