“Antitussives”(Latin: Tussis- cough) These are the agents which act upon the pulmonary membranes that hasten or alter expectoration These stimulate and expel the bronchial mucous or secretion and help in their removal “Antitussives” act in following ways By relieving spasms- Opium, Lobelia By dislodging and act vomitting- Ipecacuanha By soothing irritative respiratory centre, so make painless- Morphine, Codeine by stinulating membrane in elimination- Senega, Tolu balsam By increasing flow- Polocarpine, Emetine