Coughing is an abrupt, frequently occurring involuntary or voluntary reflex that occurs in order to clear the respiratory tract of any foreign objects. Numerous respiratory conditions, microbial infections, and chronic obstructive pulmonary diseases are frequently linked to recurrent coughing (COPD). Coughing is a contagious disease that can be spread to healthy people by bacteria and viruses. Drugs used to treat coughing and conditions related to it are known as cough medicines. Prescription Narcotic Cough Preparations and Expectorants are narcotic-based cough medications that should only be taken when prescribed by a doctor.