Excessive dose will not cause adverse symptoms to most patients or mainly cause gastrointestinal discomfort such as stomach pain, abdominal pain, vomiting and diarrhea. For a few patients, it may lead to rash, irritability or lethargy. If you take too much medicine, you should stop taking it immediately and take support or symptomatic treatment according to the symptoms. If it is an overdose in a short time, and the patient has no contraindications, vomiting or gastric lavage should be taken.