Percocet online medicine can’t be accessed without a prescription. If you buy Percocet 10mg online or offline illegally, you may go through legal procedures If you are in a pinch and need percocet, but don't have a prescription, there are several places you can go to get a free prescription.: Some pharmacies may be willing to give out prescriptions for percocet if you show them that you are in serious pain. You can also try calling your doctor's office and asking if they have any leftover or expired prescriptions that they are no longer using. If all of those options fail, you can try pharmacies outside of the United States.