I have been tested for IgE and was normal but continue to have moderate persistent asthma. Could being on Singulair (montelukast) cause the IgE to be normal and I still have allergic asthma? If not, what is keeping the asthma reoccurring?

IgE levels can range from normal to extremely high in people with asthma, even allergic asthma. Singulair will have no effect on IgE levels. Any asthmatic should have a full medical evaluation, including skin testing. This will reveal if there is an allergic component to the asthma, and help you understand what triggers need to be avoided, as well as what therapeutic interventions need to be implemented.

Singulair is just one form of treatment for asthma, and only works in 30 percent of people. So if Singulair is not doing the trick, inhaled steroids should be started.