Variant asthma can be treated with ketotifen fumarate tablets. Variant asthma belongs to a special type of asthma, which usually does not have typical symptoms such as wheezing, but may be characterized by coughing, chest tightness or other symptoms. Although the symptoms of variant asthma are different from those of asthma, the underlying pathogenesis is the same, i.e. airway hyperresponsiveness. Ketotifen fumarate tablets have antihistamine effect and play an anti-inflammatory and anti-allergic role, which can be used in the adjuvant treatment of variant asthma. However, ketotifen fumarate cannot be used only for variant asthma, but mainly inhaled bronchodilators (e.g. terbutaline) and glucocorticosteroids (e.g. budesonide) are used. Common adverse effects of taking ketotifen fumarate tablets include drowsiness, lethargy, dry mouth, nausea, dizziness, headache and so on. Ketotifen Fumarate Tablets has a sedative effect, during the drug should not drive a machine, car, boat, engaged in aerial work, do not have central inhibition of sedative-hypnotic drugs with the same use. Variant asthma patients should promptly go to a regular hospital, under the guidance of a professional doctor, strictly follow the doctor’s instructions for the correct use of medication, do not adjust the dosage of medication or stop taking medication without authorization, so as not to aggravate the condition, may develop into a typical asthma.