The standard treatment of allergic rhinitis and asthma consists of top
ical corticosteroids administered intranasally and inhaled through the
mouth. Although this therapy is highly effective, and side-effects ar
e few and mild, it may be possible further to improve the therapeutic
index and patient compliance with the treatment. In the present study,
we evaluated a nasal inhalation system used for the simultaneous trea
tment of rhinitis and asthma. In principle, it results in an airway de
position of the corticosteroid similar to that of inhaled allergens. T
wenty-four children with perennial rhinitis and asthma inhaled budeson
ide through the nose from a pressurized aerosol, attached to a spacer
device, in a double-blind, placebo-controlled, crossover study. Compar
ed with placebo, budesonide treatment resulted in a significant reduct
ion of nasal symptoms (P<0.01) and of asthma symptoms (P<0.05), and in
an increase of nasal peak inspiratory flow (P<0.001) and of oral peak
expiratory flow (P=0.01). There were no differences between budesonid
e and placebo in local side-effects, such as dry nose, nosebleed, and
hoarseness. We conclude that nasal inhalation of a corticosteroid from
a spacer offers a simple and effective treatment for both rhinitis an
d asthma in children, but it is an open question whether the nasal inh
alation system can improve the ratio of antirhinitis/antiasthma effect
s to side-effects.