Montelukast, while generally well-tolerated, can cause side effects. Common ones include headache, diarrhea, and nausea. These are usually mild and resolve without treatment. Less common, but still possible, are abdominal pain, dizziness, and insomnia.
Rare but serious side effects exist. These include allergic reactions like swelling of the face, lips, tongue, or throat; difficulty breathing; and hives. Seek immediate medical attention if these occur.
Concerning interactions, Montelukast may affect the metabolism of certain medications, including phenytoin and theophylline. Your doctor should monitor these drug levels if you are taking both Montelukast and one of these other medications. Inform your doctor of all medications, including over-the-counter drugs and supplements, you are taking before starting Montelukast to minimize potential problems.
Specific interactions and side effects can vary based on individual factors such as age, overall health, and other medications you’re using. Always consult your doctor or pharmacist if you have concerns about side effects or interactions. They can provide personalized advice based on your unique circumstances.
