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A member asked:

Would my drinking a lot of water be more likely to cause a false posit or f.neg, during 24hrurine:catecholamine?metanephrine &normetane? creatinine?

4 doctors weighed in across 2 answers

Prob won't matter: Those tests are very likely to be detected whether you drank a lot of water or not.

Dr Ali and another doctor agreed

Answered 11/11/2012

5.5k views

Thank
Dr. Kenneth Adler answered

Specializes in Psychiatry

False negative: Drinking large amounts of water could dilute the sample enough to cause false negative. Most drug screens will also factor dilution and see this as invalid test.

Answered 11/10/2012

5.5k views

Thank

Related Questions

A member asked:

I took a drug screen and it came back diluted. I did not tamper with the test by drinking a lot of water and wondered if my creatinine levels are low and if so what can I do to increase the levels in my urine.?

5 doctors weighed in across 2 answers

A member asked:

My BUN was 20 today. Can dehydration cause it to be higher? Mine has always been on low end. Creatinine is normal, no other symptoms or abnormal tests. I have barely been drinking a bottle of water per day for quite a while?

3 doctors weighed in across 2 answers

A member asked:

Can drinking lots and lots of water before blood tests falsely lower creatinine and falsely increase eGFR and increase RBC count?

2 doctors weighed in across 2 answers

A member asked:

My Bun/Creatinine is 31.9 but I drink 2 liters of water every day. I have had a lot of kidney stones in the past. Could this high number just be from kidney damage? Thanks?

3 doctors weighed in across 3 answers

A member asked:

Will my creatinine level raise from taking anabolic steroids? And will drinking lots of water bring it down for my drug screen that uses urine dilute

A doctor has provided 1 answer

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