The reason why interferon is used every other day is because the effect of interferon is time-sensitive, and the time to maintain the effective concentration of this drug is usually within 48 hours, so the next dose should be 1 day apart, which is conducive to the full absorption of the drug. In addition, interferon is a cytokine, which has the function of anti-virus, anti-tumor, regulation of body immunity, inhibition of cell proliferation, etc. Therefore, when applying interferon treatment, continuous medication is needed. In the clinic, interferon is a prescription drug, and there are many types of interferon, such as short-acting interferon needs to be used every other day, while long-acting interferon needs to be used once a week, so it must be used reasonably under the guidance of a doctor, and cannot adjust the frequency and dose of medication without authorization. When the dose is insufficient, the treatment effect may not be obvious, while when the drug is overdosed, it may lead to serious adverse reactions, such as pharmacogenic flu-like syndrome, mainly manifested as chills, weakness, fever, etc., as well as hypersensitivity reactions such as hives, mental abnormalities such as depression, irritability, etc., so patients need to regularly go to the hospital for review after using the drug. In addition, female patients who are pregnant or breastfeeding should use interferon with caution because large doses of interferon are toxic to the embryo and may cause fetal miscarriage or affect the healthy growth and development of the fetus. Since adverse reactions may occur when interferon is shared with other medications, it is important to inform your doctor if you have been using other medications recently before using the medication.