Odimont FX (montelukast and fexofenadine) is helpful for allergies and asthma, but your ongoing breathing issues, headaches, and sleep symptoms warrant a closer look. Because of the increased lung markings and sleep-related issues, seeking a second opinion from a specialist, like a pulmonologist, is a very reasonable and proactive step. Please discuss your symptoms and whether to continue Odimont FX with them.