Allerfin is an antihistamine medication containing 4mg of Chlorpheniramine maleate per tablet. This prescription medication comes in a pack of 30 tablets and is used to treat allergy symptoms like sneezing, runny nose, and itchy eyes. Chlorpheniramine maleate is a first-generation antihistamine that works by blocking histamine receptors in the body to reduce allergic reactions. The medication is manufactured by Hikma Pharmaceuticals and comes in a white package with blue and yellow accent colors. As with all antihistamines, this medication may cause drowsiness and should be taken as directed by a healthcare provider.