ZALCOF-DMR is used to relieve cough, nasal congestion, and allergy symptoms. It combines a cough sup...ZALCOF-DMR is used to relieve cough, nasal congestion, and allergy symptoms. It combines a cough suppressant (Dextromethorphan), an antihistamine (Chlorpheniramine), and a decongestant (Phenylephrine) to provide multi-symptom relief.See more