<prompt> Noscapine is an:Anti-tussiveAnti emeticAnti dirrhealMucolytics  <response>: Ans. a Anti-tussiveRef.: KDT 6th ed. 215 Forceful expulsion of air from lungs due to pulmonary irritation is called coughing. It can be productive or non- productive. Anti-tussive is a class of drug which relieves coughing by suppressing cough center. These drugs are mainly used for dry cough. Example of anti-tussives are: Opioids: Codeine, Phalcodeine, Ethylmorphine Non-Opioids: NOSCAPINE, Dextromethorphan Expectorants are class of drugs that increase bronchial secretion or reduce its viscosity mucolytics. They are mainly used in productive cough. Example of expectorants are: Mucolytics: Bromhexeine, Ambroxol Bronchial secretion enhancers: Guaiphenisine, sodium or potassium citrate 