It can provide more comprehensive relief from allergic conditions such as seasonal allergies and allergic rhinitis. Some of the common uses of this medicine include:Seasonal Allergies: The combination of montelukast and fexofenadine may be used to relieve symptoms of seasonal allergies such as sneezing, runny nose, itchy eyes, and throat.Allergic Rhinitis: The combination of montelukast and fexofenadine may be used to relieve symptoms of allergic rhinitis such as nasal congestion, runny nose, and sneezing.Asthma: Montelukast is also approved for the treatment of asthma, and when used together with fexofenadine, it can help relieve asthma symptoms such as wheezing and shortness of breath.It is important to note that montelukast and fexofenadine may not be suitable for everyone, and they should only be used under the guidance of a healthcare provider. If you are experiencing symptoms of allergies or asthma, you should consult with your doctor to determine the appropriate treatment for your condition.