After taking the medicine for 4 days and checking the liver function, if the medicine taken is not metabolized by the liver or is not completely metabolized by the liver, it usually has no effect when checking the liver function. However, some drugs need to be metabolized by the liver, and there is a certain effect on the liver function check after taking the drug for 4 days. Therefore, whether the liver function is affected by taking 4 days of drugs has a certain relationship with the metabolic pathway of the drugs taken. Drugs will be metabolized by the liver, especially for people with poor liver function, the metabolism will be affected, may increase the burden on the liver, resulting in significant abnormalities in liver function. However, for some drugs that have less impact on the liver or are not metabolized by the liver, taking 4 days of medication to check liver function may not have an impact on the test results. To summarize, you can’t judge whether a drug will affect liver function simply based on the time you take the drug. Suffering from certain diseases, you need to follow the doctor’s instructions under the guidance of the doctor targeted medication, not alone, especially for those who need to take drugs for a long time, but also need to go to the hospital regularly to check the liver function.