Temporarily relieves these symptoms due to hay fever or other upper respiratory allergies:. Runny nose. Itchy, watery eyes. Sneezing. Itching of the nose or throat. Aller-chlor, with active ingredient chlorpheniramine, is an antihistamine used in the treatment of allergies, including inhalant allergies (atopy). It can be used to ease itchy skin, rashes, and other signs of allergies.