My husband had severe bronchitis, he had 2 lets of antibiotics from the doctor but nothing would clear it. He tried two cough medicines but they just burnt his mouth. The cough would keep him awake, he was just really bad. I read about Mullein and thought it was worth a try and it only took 2-3 days to start to improve. He had an accident in his workshop and had to see the doctor, who listened to his chest and gave him an absolute all clear.