Histan Syrup is an antihistamine medication formulated to provide relief from various allergic symptoms. This 100ml syrup contains chlorpheniramine maleate as its active ingredient and is manufactured by Kuwait Saudi Pharmaceutical Industries Co. This medication is used to treat allergy symptoms such as sneezing, runny nose, itchy/watery eyes, and skin reactions. The syrup format makes it easier to administer, especially for children and those who have difficulty swallowing tablets. As with all medications, it should be taken as directed by a healthcare provider and stored at room temperature away from direct sunlight. Common side effects may include drowsiness.