Interferon is a commonly used drug for the antiviral treatment of hepatitis B. It has long-lasting efficacy and low relapse rate after discontinuation of the drug for the treatment of hepatitis B. The mutation rate of hepatitis B virus via interferon treatment is low, and there is no need to worry about the deterioration and aggravation of liver function after interferon discontinuation. The duration of interferon treatment is limited (generally 6-12 months), and some can be extended to 18 months. The long duration of treatment causes a lot of inconvenience to patients. Question 1: Can I inject interferon myself? Do I have to go to the hospital? 1, the side effects of interferon Interferon has many adverse reactions, the most common is the flu-like syndrome. What is influenza-like syndrome? As the name implies, it is like the flu with fever, body aches, headaches, nausea. Generally, these symptoms occur 2-6 hours after the interferon injection and slowly recover after 4 hours. Of course, the situation varies from patient to patient, with some people experiencing significant symptoms or even a high fever of 39 degrees or more, while others simply feel chilled. Probably more than 90% of patients will develop flu-like symptoms, but more than 90% of patients will be able to carry through on their own without treatment. Only a few require intervention, such as non-steroidal anti-inflammatory drugs to relieve symptoms. The severity of adverse reactions varies with individual differences. In the case of patients with hepatitis B, there will be a decrease in white blood cells and platelets during the examination after treatment with interferon, so it is important to closely observe the changes in blood picture during the treatment. The result will be more serious if the long-term use of interferon causes the mutation of the virus. The actual fact is that it is best to be in the hospital, according to the patient’s response, under the guidance of the doctor to use the medication. The actual fact is that you can find a lot of people who have been in the business for a long time. The hospital storage interferon is more insurance. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. Question 2: Is interferon injected intramuscularly or subcutaneously? Where is the injection site? It can be injected in the buttocks, upper arms and abdomen, preferably subcutaneously. (1) Subcutaneous injection is absorbed more slowly and can maintain the effective concentration of interferon in the body for a longer period of time; (2) Subcutaneous lymph and other immune tissues are abundant, which is more conducive to the effect of interferon.