Ketotifen fumarate tablets can be used for children, but there is no clear data on the specific time of use, should be used under the guidance of a doctor. Ketotifen Fumarate is mainly used for the treatment of allergic rhinitis and allergic bronchial asthma, the dosage for children is generally less than that of adults, and there is no clear limit on the time of use, which needs to be determined according to the condition of the child, and it is recommended that the guidance of the doctor prevails. Drowsiness, dry mouth, nausea, fatigue, dizziness, headache, weight gain and other adverse reactions may occur with ketotifen fumarate. The drug is contraindicated in people who are allergic to ketotifen fumarate, as well as allergic individuals should use the drug with caution. If discomfort occurs, stop using the drug and go to the hospital for examination.