bronchitis
"I have bronchial Asthma, I thought I I had bronchitis, I took Guaifenesin for it, it felt like my bronchials were closing up on me, I had to call my dr to tell him to get me prednisone.  I took just a half tab of Guaifenesin before I went to bed, I woke up spasing, I couldn't breath.  I had a do a couple of nebulizer treatments, take a prednisone to open me up. I called my doctor, he said don't take it anymore."