Montelukast is a commonly prescribed medication used to treat asthma and allergy symptoms. It is known by many different names, including Singulair, Onbrez, Accolate, and Zafirlukast. These medications work by blocking substances in the body that cause inflammation and narrowing of the airways, making it easier to breathe. While they are all used to treat similar conditions, each medication has its unique characteristics and may be better suited for certain patients. When undergoing medication therapy, it is important to follow your doctor's instructions and take your medication as prescribed to achieve the best possible outcomes.