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Could strange changes in my brother’s behavior be due to taking Singulair?

Yes. Although it is rare, taking Singulair could cause your brother to have behavior changes. These can include:

• agitation
• aggressiveness
• anxiety
• irritability
• strange dreams
• seeing things that aren’t there
• hearing voices that aren’t there
• depression
• trouble falling asleep or staying sleep
• sleep walking
• thinking about or planning to kill himself

Your brother should tell his doctor if he is having any of these behavior symptoms.

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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.