I can't find any information on the medication chlorpheniramine maleate 4mg on here, any information?

Antihistamine: Chlorpheniramine is a first generation antihistamine. It has been around for a long time and is available in a lot of over the counter medications. While effective for mild allergies it can cause drowsiness in many people. Second generation antihistamines such as Claritin (loratadine) or Allegra (fexofenadine) are often a better choice as they are non-sedating.