Actually it has been shown that asthma inhalers can show positive for methamphetamine
Have A Drug Test In 12 Hours Will Seretide And Ventolin (asthma Inhalers) Show Up In The Drug Test? Will Have Had Taken Both Medications Approximately 24hours Before The Test. Asthma Excludes You From The Receiving Employment
They won't be testing for that. Companies test for narcotics (cocaine, opiates, benzos, thc, barbituates, meth,etc.)