The most serious adverse effects of artificial oxymetholazole capsules are seizures and peripheral neuropathy at high doses, the latter mainly manifesting as numbness and abnormal sensation in the extremities. In some cases, persistent peripheral neuropathy may occur with long-term use of the drug. Other common adverse reactions include: (1) Gastrointestinal reactions, such as nausea, loss of appetite, vomiting, diarrhea, abdominal discomfort, altered taste, dry mouth, and metallic taste in the mouth. (2) Reversible granulocytopenia. (3) Allergic reactions, rash, urticaria, pruritus, etc. (4) Central nervous system symptoms, such as headache, vertigo, syncope, abnormal sensation, limb numbness, ataxia and confusion. (5) Other symptoms include fever, vaginal candida infection, cystitis, difficulty in urination, dark urine, etc. All of them are reversible and recover on their own after stopping the drug. Metronidazole can cross the placenta and enter the fetal circulation rapidly, so it is prohibited for pregnant women. The concentration of metronidazole in breast milk is similar to that in blood, so it should not be used by nursing mothers. If the drug must be used, lactation should be interrupted. If CNS adverse reactions occur during use, the drug should be discontinued promptly. Alcoholic beverages should not be consumed during the drug administration, otherwise patients may experience abdominal cramps, nausea, vomiting, headache, facial flushing, etc. The metabolism of this product is slowed down in patients with reduced liver function and should be reduced.