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U.S. Department of Health and Human Services


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Singulair (montelukast)

Audience: Pulmonologists, respiratory therapists, other healthcare professionals, patients

[UPDATE 01/13/2009] FDA provided updated information to its March 2008 Early Communication. FDA is continuing to review clinical trial data to assess other neuropsychiatric events, (mood and behavioral adverse events) related to drugs that act through the leukotriene pathway (montelukast, zafirlukast, zileuton). As a result, FDA has not yet reached a definitive conclusion regarding the clinical trial data on mood and behavioral adverse events associated with montelukast, zafirlukast, and zileuton.

[Posted 03/27/2008] FDA informed healthcare professionals and patients of the Agency's investigation of the possible association between the use of Singulair and behavior/mood changes, suicidality (suicidal thinking and behavior) and suicide. Singulair is a leukotriene receptor antagonist used to treat asthma and the symptoms of allergic rhinitis, and to prevent exercise-induced asthma. Patients should not stop taking Singulair before talking to their doctor if they have questions about the new information. Healthcare professionals and caregivers should monitor patients taking Singulair for suicidality (suicidal thinking and behavior) and changes in behavior and mood.

This early communication is in keeping with FDA’s commitment to inform the public about its ongoing safety reviews of drugs. Due to the complexity of the analyses, FDA anticipates that it may take up to 9 months to complete the ongoing evaluations. As soon as this review is complete, FDA will communicate the conclusions and recommendations to the public.

[January 13, 2009 - Follow-up to the March 27, 2008 Communication - FDA]
[March 27, 2008 - Early Communication About an Ongoing Safety Review - FDA]