Ketotifen Fumarate Tablet is a western medicine, an antihistamine, used for allergic rhinitis and allergic bronchial asthma. The main ingredient of this product is ketotifen fumarate, which is used in the treatment of allergic diseases, the specific dosage and usage of this drug need to be applied under the guidance of a doctor. If there are any adverse reactions during the use of the drug, patients can be seen to have drowsiness, lethargy, dry mouth, as well as gastrointestinal reactions such as nausea, occasional headache, dizziness, sluggishness, as well as weight gain. During the treatment period, patients should not drive cars, boats, as well as engage in aerial work, children need to take medication under the guidance of a doctor, allergic to the product is prohibited, allergic people should be used with caution. In addition, patients with systemic internal diseases also need to take this drug under medical supervision.