Who should not take montelukast?

If you are already using montelukast for asthma or allergy treatment, you should not use it for breathing problems caused by exercise. Do not use this asthma prevention medication for a child unless prescribed by your child's doctor. You should not use montelukast if you are having an asthma attack, because it does not work quickly enough to help your symptoms. You should not use montelukast if you are allergic to this medication or any of its ingredients. If you have a condition called phenylketonuria (PKU), ask your doctor about the use of the chewable form of montelukast, because it may contain phenylalanine. Talk to your doctor before using montelukast if you are pregnant or want to breastfeed your baby.

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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.