Lit-C Syrup is a combination pharmaceutical formulation containing Chlorpheniramine Maleate (2mg/5ml) and Phenylephrine (5mg/5ml), indicated for the symptomatic relief of allergic conditions and nasal congestion associated with common cold, hay fever, and other upper respiratory tract allergies. Chlorpheniramine Maleate is an antihistamine that competitively inhibits H1 histamine receptors, thereby alleviating symptoms such as sneezing, runny nose, and itching. Phenylephrine acts as a selective alpha-1 adrenergic receptor agonist, producing vasoconstriction of the nasal mucosa and reducing nasal congestion. This dual-action syrup provides effective relief by addressing both histamine-mediated allergic symptoms and nasal airway obstruction. Lit-C Syrup is typically administered orally in measured doses according to age and severity of symptoms, with caution advised in patients with hypertension, cardiovascular disorders, hyperthyroidism, or glaucoma due to the vasoconstrictive properties of phenylephrine. Common adverse effects may include drowsiness, dry mouth, dizziness, and mild gastrointestinal disturbances. Use during pregnancy and lactation should be under medical supervision. Patients are advised to avoid concomitant use with monoamine oxidase inhibitors (MAOIs) or other sympathomimetic agents. Lit-C Syrup offers a balanced therapeutic approach for managing allergic rhinitis and nasal congestion, enhancing patient comfort and respiratory function.