The price of montelukast varies from hospital to hospital and from manufacturer to manufacturer, usually ranging from $20 to $50. The main ingredient of montmorillonite powder is montmorillonite, which is a white or light yellow powdery drug, mainly for the treatment of diarrhea. It is usually taken by patients through mixing with water to relieve diarrhea, but long-term use in large quantities will lead to constipation, dry stools and other discomforts. In addition, Montelukast can have adverse reactions such as nausea, vomiting, skin rash, and liver and kidney function impairment. Montelukast is priced differently according to different manufacturers and hospitals, but its main ingredients are similar. Before taking Montelukast, patients must consult a physician and take it under the guidance of the physician, and must not choose the medication on their own.