Hicet-DC Tablet is a combination medication containing Cetirizine 10 mg and Phenylephrine 10 mg, formulated for the relief of symptoms associated with allergic rhinitis, common cold, and sinus congestion. Cetirizine, a second-generation antihistamine, selectively inhibits peripheral H1 receptors, thereby reducing allergic symptoms such as sneezing, nasal itching, rhinorrhea, and watery eyes without causing significant sedation. Phenylephrine, a selective alpha-1 adrenergic receptor agonist, acts as a decongestant by constricting dilated blood vessels in the nasal mucosa, leading to decreased nasal congestion and improved airflow. This dual-action tablet effectively alleviates nasal congestion, sneezing, and other allergic manifestations, enhancing patient comfort and quality of life. Hicet-DC is indicated for the symptomatic management of allergic rhinitis, hay fever, and nasal congestion associated with upper respiratory tract infections. It should be used with caution in patients with hypertension, cardiovascular disease, or hyperthyroidism due to the vasoconstrictive effects of Phenylephrine. Common adverse effects may include headache, dizziness, dry mouth, and palpitations. The medication is contraindicated in patients with known hypersensitivity to Cetirizine, Phenylephrine, or any component of the formulation. Dosage and administration should follow physician guidance to ensure safety and efficacy.