Dextromethorphan + Phenylephrine + Cetirizine is mainly used to manage symptoms of the common cold, flu, allergies, and other respiratory illnesses. It belongs to the category of combination medications consisting of an antihistamine, a cough suppressant, and a decongestant. The multi-action formula is also used to relieve symptoms like sneezing, runny nose, itching or watery eyes, coughing, and nasal congestion associated with these conditions. The multi-action formula helps relieve symptoms such as sneezing, runny nose, itchy or watery eyes, coughing, and blocked nose caused by these conditions.