Shunrnin, commonly known as montelukast sodium, and ketotifen can generally be taken together, but need to be used under the guidance of a doctor. Ketotifen is a histamine H1 receptor antagonist, which can inhibit the release of allergic reaction mediators, with anti-allergic effect, can be used in the treatment of allergic asthma; montelukast sodium is a leukotriene receptor antagonist, can inhibit the inflammatory response of the airway, control asthma attacks; the two drugs have a synergistic effect can be paired with the treatment of allergic bronchial asthma. It is important to note that ketotifen is contraindicated in people who are allergic to ketotifen components; ketotifen is contraindicated in diabetic patients taking hypoglycemic drugs. Drowsiness is a common side effect of ketotifen. Montelukast sodium is contraindicated in people who are allergic to any of the ingredients in Montelukast sodium. Abdominal pain, diarrhea, dyspepsia, nausea, and vomiting may occur in a small number of people taking montelukast sodium. If you need to use the medicine, please use it under the supervision of a doctor.