You don’t need a prescription to get yourself a liver function test, although, there is no harm in getting the prescription. It is a non-invasive procedure. The blood is drawn from your arm in a completely hygienic and safe manner. There has been no history of people suffering from medical complications after opting for a liver function test. In fact, if you’re feeling suspicious that there could be something wrong with your liver, you should get yourself a liver function test as soon as possible.