Montelukast (Singulair) — Uses, Side Effects & Interactions

Montelukast is a medication in the Leukotriene Receptor Antagonist class, sold under the brand name Singulair. It is one of the most commonly prescribed medications in the United States. Below you'll find key information about its uses, side effects, and important drug interactions.

What Is Montelukast Used For?

Montelukast is prescribed to treat the following conditions:

• Asthma
• Allergies (Allergic Rhinitis)

Your doctor may also prescribe montelukast for other conditions not listed here. Always take this medication exactly as prescribed and discuss any questions with your healthcare provider.

Common Side Effects

Most people taking montelukast may experience some of the following side effects, which are generally mild and may improve as your body adjusts:

• headache
• stomach pain
• fatigue
• cough

Drug Interactions

Montelukast can interact with other medications and substances, potentially changing how the drug works or increasing the risk of side effects. Important interactions include:

• phenobarbital
• rifampin
• gemfibrozil

Always inform your doctor and pharmacist about all medications, supplements, and herbal products you are taking. GProv's AI health navigator, Appi, can help you check for potential drug interactions.

Important Safety Information

This page provides general educational information about montelukast and is not a substitute for professional medical advice. Do not start, stop, or change the dosage of any medication without consulting your healthcare provider. If you have questions about whether montelukast is right for you, speak with your doctor or pharmacist.