A higher-than-normal amount of phlegm can build up in your nose, throat, and lungs when you are sick. This build-up may cause coughing and discomfort. Bloody, brown, white, yellow, or green phlegm ...
The committee “unanimously concluded that the current scientific data do not support that the recommended dosage in the OTC cold, cough, allergy, bronchodilator and antiasthmatic drug products ...