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Allergy medications: Know your options

Leukotriene inhibitors

A leukotriene inhibitor blocks chemicals that cause allergy symptoms. These chemicals are called leukotrienes. This oral medicine relieves asthma and hay fever and is available by prescription only.

Side effects of leukotriene inhibitors include anxiety, depression, strange dreams, trouble sleeping, and suicidal thinking or behavior.

An example of a leukotriene inhibitor:

  • Montelukast (Singulair).