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A member asked:

Can drinking lots of water before a saliva and urine test for alcohol produce inaccurate results? my sister who is an alcoholic and in court mandated treatment did this today and got a result that was negative. the family knows she has been drinking?

A doctor has provided 1 answer

Diluting the urine by drinking water is detectable by urine examination. A good lab tests for other markers to rule out this gamesmanship. There are other tests than cannot be affected by drinking more water.

Dr Ferranti agreed

Answered 6/5/2021

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