Basic Information on Montelukast

What Should I Tell My Healthcare Provider?

You should talk with your healthcare provider prior to taking montelukast if you have:
  • Phenylketonuria
  • Liver disease, such as liver failure or cirrhosis
  • Any allergies, including allergies to food, dyes, or preservatives.
Also, let your healthcare provider know if you are:
Make sure to tell your healthcare provider about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements.
(Click Precautions and Warnings With Montelukast to learn more, including information on who should not take the drug.)

How Does It Work?

Montelukast is part of a group of medications called leukotriene modifiers. Leukotrienes are chemicals produced by the body in response to allergens or other problems. In the lungs, they cause swelling and inflammation in the airways and constriction of the muscles of the respiratory tract. In the nose, leukotrienes are released after exposure to allergens (substances that cause allergies), leading to allergy symptoms.
Montelukast works by blocking leukotriene receptors, preventing these chemicals from causing allergy or asthma symptoms.
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