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What is Cough syrup acts by inhibiting and explain in detail?
Ans. (a) Cough center* 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