Guaifenesin, a mucoactive drug, acts by loosening mucus in the airways and making coughs more productive. It is used for relief of wet cough and chest congestion due to the common cold, and remains the only legally marketed expectorant...

What is chronic bronchitis? Chronic bronchitis is a type of COPD (chronic obstructive pulmonary disease). COPD is a group of lung diseases that make it hard to breathe and get worse over time. The other main type of COPD is...

People with bronchitis have swelling and inflammation in their bronchial tubes, the air passages that link the mouth and nose with the lungs. Symptoms of bronchitis include a cough, wheezing, and difficulty breathing. People may also have trouble clearing heavy...