Generic name: Potassium Iodide
Yodefan is a medicine to treat lung disorders or conditions due to mucus complication, including bronchitis, bronchial asthma, and emphysema). It may also be used by your physician to treat certain other conditions.
It refers to expectorants. It thins phlegm (lung mucus), so it is not so sticky. The mucus becomes easy to cough out. It makes cough productive and decreases congestion in the chest.