Zoline Eye Drop is a multi-ingredient ophthalmic solution formulated to provide effective relief from ocular irritation and redness. It contains Naphazoline (0.056% w/v), a sympathomimetic agent that acts as a vasoconstrictor to reduce conjunctival redness by constricting dilated blood vessels. Hydroxypropylmethylcellulose (0.25% w/v) serves as a lubricant, enhancing ocular comfort and protecting the corneal surface by maintaining moisture. Chlorpheniramine Maleate (0.01% w/v), an antihistamine, helps alleviate allergic symptoms such as itching and swelling by blocking histamine receptors. The formulation also includes Boric Acid (1.25% w/v) and Sodium Chloride (0.05% w/v), which act as buffering and isotonic agents to maintain ocular pH and osmolarity, ensuring compatibility with the eye’s natural environment. Zinc Sulfate (0.012% w/v) contributes antimicrobial properties, supporting the prevention of secondary infections. Chlorbutol (0.5% w/v) is incorporated as a preservative to maintain sterility and stability of the solution. Zoline Eye Drop is indicated for symptomatic relief of eye redness, dryness, and allergic conjunctivitis. It should be used as directed by a healthcare professional, with caution advised in patients with narrow-angle glaucoma or hypersensitivity to any components.