Miscellaneous Agents
❖The cough is a protective physiological reflux (both, voluntary
and involuntary) to clear the airway.
❖Infections, chemical irritants, retained body secretions and the
presence of foreign bodies that block one’s airways and causes
coughing by stimulating the nerve endings in the respiratory
tract.
❖Dry and Productive Cough: Irritative or unproductive cough
is dry cough, which may be caused by colds or by inhalation of
irritating dust and gases and produces no sputum or other
discharge,
❖ whereas productive cough is sputum or exudate producing
cough and is often associated with asthma and bronchitis.
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