Adverse reactions such as rash, itching, headache, dizziness, nausea and vomiting may occur when taking Trimethoprim Maleate Tablet, so it needs to be used with caution. Trimethoprim maleate tablets is a kind of drug to regulate the function of gastrointestinal tract, which is mainly used to improve the symptoms of nausea, vomiting, poor appetite, abdominal pain, abdominal distension and so on caused by gastrointestinal tract diseases, but allergy, headache, dizziness, nausea, vomiting and other adverse reactions may occur when taking the drug orally. 1. Allergic reaction: skin rash, itching, dizziness, dyspnea and so on may occur after taking the medicine, if allergic phenomenon should stop the medicine immediately and seek medical advice. 2. Other adverse reactions: such as headache, dizziness, nausea, vomiting and so on can easily occur after taking the drug. Drugs need to be used under the guidance of a doctor, such as the occurrence of adverse reactions, should immediately stop the drug to seek medical attention to avoid adverse consequences.