 There is a database for safety which incorporates more than 4000 volunteers and 1723 patients which were asthmatic.Some of the side effects are similar to that of montelukast for example headache, infection, abdominal pain, fever, and multiple others.The cysteinyl leukotrienes (LTC4, LTD4, LTE4) are powerful inflammatory inducing eicosanoids that are produced and released by various cells of the immune system.