Levodropropizine (cough suppressant) and Chlorpheniramine maleate (antihistamine). Levodropropizine belongs to the class of cough suppressants that work by blocking the transmission of nerve signals from the cough centre in the brain to the muscles that produce cough. Chlorpheniramine maleate belongs to the class of antihistamines (anti-allergic drugs) that works by blocking the action of histamine, a substance responsible for causing allergic reactions. Together, Levodropropizine+chlorpheniramine Maleate provides relief from dry cough.