Is there anything that can make you show positive for methamphetine other than methamphetamine on a drug test?

I showed positve on a UA for methamphetamine, and did not use the drug. Did the testing agency screw up, or is it possible to breathe or consume anything that would show as methamphetamine in one's system?

: http://alcoholdrugstreatment.info/is-there-anything-that-can-make-you-show-positive-for-methamphetine-other-than-methamphetamine-on-a-drug-test