Metronidazole refers to Metronidazole Sodium Chloride Injection, headache after infusion of Metronidazole Sodium Chloride Injection may be an adverse reaction to the drug, you need to drink more water to promote drug metabolism, to ensure adequate rest, and replacement of antibacterial drugs. Metronidazole sodium chloride injection is a class of antibacterial drugs mainly for the treatment of anaerobic infections, its adverse reactions include nausea, abdominal pain, headache, dizziness, etc., patients with active central nervous system disease and patients with hematologic disorders are prohibited. Headache after infusion of metronidazole sodium chloride injection may be the emergence of drug-related adverse reactions, need to drink more water to promote drug metabolism, ensure adequate rest, and according to the drug sensitivity test to change the type of antibiotic (such as penicillin amoxicillin clavulanic acid potassium, etc.). Headache after infusion of metronidazole sodium chloride injection needs to be promptly reflected to the medical staff, timely adjustment of the treatment program to avoid adverse consequences.