Severe Croup Cough & Chest Retractions Resulting in Hospitalization In this study Johnson and colleagues evaluated outcomes in children with mild croup seen in hospital ERs, half of whom were treated with a single dose of dexamethasone and the other half with placebo. Improvement then deterioration Give further doses of adrenaline. This leads to fluid resorption from the interstitium and improvement in the laryngeal mucosal edema. The symptoms are often worse at night and reach their worst on the second or third night of the illness. The fact that an illness will usually resolve if left untreated in no way infers that it should be left untreated. She has the cough but is in great spirits with tons of energy.