<unk>  is an medical emergency caused by an acute exacerbation of asthma that does not respond to standard bronchodilator and corticosteroid therapy. Symptoms include chest tightness, rapidly progressive dyspnea, non-productive cough and wheezing.<unk>  if left untreated may result in severe bronchospasm, mucus plugging and rapidly develops acidosis and respiratory failure as a consequent of carbon dioxide retention and hypoxemia.
Status asthmaticus
Nocturnal asthma
Foreign accent syndrome
Sleep apnea
Motion sickness
Exercise induced asthma
Smoker's cough
Anaphylaxis