To reduce swelling and tightness in their airways, some children with asthma are treated for months or years with an oral corticosteroid, such as prednisone. Others may be treated with a short “burst” of an oral corticosteroid for five to seven days. A burst is prescribed in an emergency situation when asthma severity markedly intensifies. While corticosteroids are known to suppress immune function, children receiving oral corticosteroid treatment rarely have complications from chickenpox.
There is no evidence that an inhaled corticosteroid poses an increased risk for children with asthma who are exposed to chickenpox. Inhaled corticosteroids are used for long-term relief of symptoms and reduce the need for extra medicine, such as oral steroids.