Macbery Cold Syrup is a combination oral medication formulated to provide symptomatic relief from common cold and allergic conditions. It contains Chlorpheniramine Maleate (2mg/5ml), an antihistamine that effectively reduces allergic symptoms such as sneezing, runny nose, and watery eyes by blocking histamine H1 receptors. Additionally, it includes Phenylephrine (5mg/5ml), a selective alpha-1 adrenergic receptor agonist that acts as a decongestant by constricting nasal blood vessels, thereby reducing nasal congestion and improving airflow. This dual-action formulation is indicated for the management of nasal congestion, allergic rhinitis, and other upper respiratory tract symptoms associated with the common cold. Macbery Cold Syrup should be used in accordance with dosage instructions provided by a healthcare professional, typically administered orally in measured doses for adults and children above a specified age. Caution is advised in patients with hypertension, cardiovascular diseases, glaucoma, or hyperthyroidism due to the vasoconstrictive effects of Phenylephrine. Common side effects may include drowsiness, dry mouth, dizziness, or nervousness. Patients are advised to avoid operating heavy machinery or driving if affected. Consultation with a healthcare provider is recommended prior to use, especially in pregnant or breastfeeding women.