A member asked:

I am wearing a sweat patch for drug screening & it came up positive for meth & i haven't used at all. i did 2 hair folicle test and the first can positive for meth. haven't used in over 3mo on hydroxizine can this cause false positive?

A doctor has provided 1 answer
Dr. Yvette Kratzberg answered

Specializes in Pediatrics

Methamphetamine use of any kind or quantity will be picked up on drug tests for approximately 90 days. (plus or minus 10-15 days) Hair follicle tests can be positive for 6 months. Hydroxizine is not known to cause false positives for Meth. Ask for another test to be done or more specialized test such as gas chromatography-mass spectrometry (GC-MS) or high-performance liquid chromatography (HPLC)

Answered 9/27/2022

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