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What should I know about montelukast before taking it?

You should not take montelukast if you are having an asthma attack, because it does not work quickly enough to help your symptoms. You may need to use this medication for several weeks before seeing an improvement in your symptoms. If you are already using montelukast for asthma or allergy treatment, you should not use it for breathing problems caused by exercise. If you think you need more of this or other medications or you feel worse or believe it is not working as well as usual, call your doctor. Tell your doctor if you are allergic to medications such as aspirin, because you may need adjustments in your dosage of montelukast. The chewable tablet of this drug contains phenylalanine, so talk to your doctor about taking montelukast if you have a condition called phenylketonuria (PKU). Tell your doctor if you are pregnant, plan to become pregnant or are breastfeeding. Keep a quick-acting beta-agonist medication (a rescue inhaler) available to treat an acute asthma attack.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.