Compound sulfamethoxazole tablets work for the treatment of infections caused by sensitive bacteria, patients should follow the doctor’s instructions to use the drug. Sulfamethoxazole Tablets is a kind of compound preparation, including sulfamethoxazole and methotrexate, belonging to sulfonamide antibacterial drugs, the mechanism of action is to double block the folic acid metabolism of bacteria. Clinically, this drug is mostly used to treat various infections caused by sensitive bacteria, such as Pneumocystis carinii pneumonia, acute otitis media in children and acute attack of chronic bronchitis in adults caused by Streptococcus pneumoniae or Haemophilus influenzae, traveler’s diarrhea caused by enterotoxin-producing Escherichia coli bacteria, as well as urinary tract infections caused by sensitive strains of Escherichia coli and Klebsiella species, and so on. It should be noted that the use of Compound Sulfamethoxazole Tablets is prohibited for those who are allergic to any of the components of this drug, patients with macrocytic anemia, pregnant women, lactating women, infants less than 2 months of age, and those with severe hepatic or renal impairment. Some patients may experience adverse reactions such as drug rash, drug fever, sore throat, hemolytic anemia, hyperbilirubinemia, nausea, vomiting, headache, fatigue, etc., and should consult a doctor promptly if the symptoms are serious. Patients should follow the doctor’s instructions to use cotrimoxazole tablets, not blindly use their own medication, so as not to affect the condition, or adverse reactions.