Does oxycontin and percocet show up the same in urine test.

Most definitely. They are basically the same compound, oxycodone. Oxycontin is a time released pill of high concentration. Percocet is oxycodone mixed with acetamenophen.

And be careful, both are highly addictive.

Are drugs getting way too important to you? Are they causing you problems?

They don't show up on a standard drug test at all