5. Medication
There are many types of prescription medication that can potentially affect the liver and cause elevated liver enzymes in the blood if you’ve been taking the medication for a while. This is usually an expected effect of the medication that both the doctor and pharmacist are aware of, though just in case they aren’t you should get into the habit of always doing your own additional research on medications that you’re prescribed for yourself to have a better idea of what you’re taking and what the associated effects might be.
If elevated liver enzymes are listed as one of the associated side-effects of a medication, it’s common for doctors to order blood tests before you start taking the medication and then additional blood tests again once you’ve been taking it for a few weeks or months. This is done regularly to monitor the increase of liver enzymes and to adapt the medication once it gets out of control.