In this article, the authors review the recent studies on antileukotriene c
ys LT1 receptor inhibitors, in the context of specific provocation tests an
d in the maintenance treatment of chronic asthma. Antileukotrienes represen
t an original class of anti-inflammatory drugs. On specific stimulation tes
ts and exercise tests, they inhibit the fail in FEV1, both at the early pha
se and at the delayed phase. Their efficacy in chronic asthma has been demo
nstrated by numerous double-blind placebo-controlled studies, in adults or
children with mild-to-moderate persistent asthma. They induce a reduction o
f the symptom score, beta-2 mimetic consumption, and improvement of peak ex
piratory flow rate and FEV1. Antileukotrienes therefore have a place in the
prevention of exercise-induced asthma and in the maintenance treatment of
mild-to-moderate persistent asthma in children and adults. Zn this indicati
on, they must be coprescribed with inhaled steroids.