Ketotifen tablets alone are not recommended for upper respiratory tract infections and are not effective. Ketotifen tablets belong to the antihistamines, mainly for the treatment of allergic reactions such as allergic rhinitis, also effective in the treatment of sneezing, runny nose caused by upper respiratory tract infections. It can counteract histamine-induced bronchial smooth muscle contraction, and has a strong inhibitory effect on histamine-induced local capillary dilation and increased permeability. Since ketotifen tablets can only treat sneezing and runny nose caused by upper respiratory tract infections, it is not effective when used alone. Antipyretic and analgesic drugs such as ibuprofen and phlegmolytic drugs such as acetylcysteine can be added. Upper respiratory tract infections can be treated with anti-infective therapy for the cause of the infection, such as antibiotic medications (amoxicillin, cefuroxime, etc.) for bacterial causes, which need to be prescribed by a doctor. Ketotifen tablets can cause common adverse reactions such as drowsiness, lethargy, dry mouth. It is contraindicated in people who are allergic to this drug or who work at heights. If symptoms of upper respiratory tract infection such as cough, runny nose, etc. occur, you should go to the hospital in time, do not self-medication, so as not to delay the condition or adverse reactions.