Symptoms of metronidazole tablets allergy, including rash, facial flushing, and even anaphylaxis. Metronidazole, an anti-anaerobic bacteria, anti-protozoa drug, can be used in the clinic for respiratory, gastrointestinal, urinary tract infections, skin soft tissue and other infections caused by anaerobic bacteria. The drug has a powerful role in killing trichomonas and protozoa, and at the same time inhibits the synthesis of deoxyribonucleic acid in some bacteria, thus killing the bacteria. During the period of taking the drug, you need to focus on the presence of skin angioedema, wind clouds with itching, oozing and other rash-like allergic reactions, other allergic symptoms also include facial flushing, dizziness, headache, and so on, and in severe cases, it even manifests itself as respiratory difficulties, laryngeal edema and then anaphylactic shock. Therefore, Metronidazole tablets are prohibited for those who are allergic to Metronidazole tablets. If you are taking metronidazole, follow the doctor’s instructions, and if allergy-related symptoms occur, it is recommended that you go to a regular hospital immediately to avoid delaying your condition.