Decolgen is a combination medicine that is often used to relieve symptoms of the common cold and allergic rhinitis. The ingredients can differ slightly depending on the form of the product, and how it is used may also vary.

Chlorpheniramine 4mg is a medication commonly prescribed to treat allergy symptoms such as hives, angioedema, and rhinitis. So, what is Chlorpheniramine 4mg and what is the correct dosage?