There is no such thing as domestic interferon or imported interferon, patients can follow the doctor’s instructions according to their own financial situation. Usually, the efficacy of domestic interferon and imported interferon is the same, the main difference lies in the price, so there is no which one is better. Interferon, as an injectable western drug, has an immunomodulatory effect, antiviral effect, and can also inhibit the proliferation of tumor cells, so it is commonly used in the treatment of malignant tumors, viral diseases, such as chronic leukemia, melanoma, warts and so on. Some patients are susceptible to adverse reactions such as chills, fever, rash, alopecia, dyspnea, etc. after the application of interferon. Interferon is contraindicated for drug allergy, bone marrow suppression and severe cardiac, hepatic or renal insufficiency to prevent accidents. Interferon should be used with caution in pregnant women, breastfeeding women and those with a history of heart disease or arrhythmia. It is recommended that patients choose domestic or imported interferon treatment according to their own condition and economic situation, and not to use the drug on their own. If any discomfort occurs after the use of the drug, the drug should be stopped promptly and the doctor should be informed to take measures to deal with it.