This combination of Cetirizine (5 mg), Phenylephrine HCl (5 mg), and Bromhexine (4 mg) is designed to relieve respiratory symptoms associated with allergies, colds, and congestion. Cetirizine is an antihistamine that helps alleviate allergy symptoms like sneezing, itching, and runny nose by blocking the action of histamine, a chemical involved in allergic reactions. Phenylephrine HCl is a nasal decongestant that constricts blood vessels in the nasal passages, reducing congestion and easing breathing. Bromhexine is a mucolytic agent that thins and loosens mucus, making it easier to cough up phlegm and clear the airways. Together, this combination effectively addresses allergy, congestion, and mucus-related symptoms for improved respiratory comfort.