text: does having kidney stones make a drug test show positive for any drug? my sister has been going to a drug court program and she said her test has been showing + for meth and she says she doesnt do anything and i'm worried about her lol...a kidney stone is definitely not likely to cause her to test postively for meth.    on the other hand, doing meth and lying about it to family and friends, well...yes, that will cause a true positive every time.