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Hello,Answers provided are for informational use only and don't confer patient-provider relationship. My name isXXXXX and I will do help you.
That is correct. Each drug (and metabolite) has its own chemical "footprint" detectable by GC/MS. The equipment can differentiate between metabolites of Xanax versus Valium. There is next to no chance that there is enough Valium metabolite left in your system to trigger a positive result via GC/MS.