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No, from chemical percentage, they are able to tell how long that urine as been out of the bladder. Urine's chemical composition will change with time. Using old urine to pass a drug test is not a good idea since this trick has been used by many and they devised ways to test urine for age.

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11y ago
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8y ago

Yes, but first of all, you will need to be able to get the sample into the testing room. Second, you will need to know every substance, medication, food, etc. that the person has consumed within the last 24 to 48 hours and possibly the last month or longer and you will have to keep the sample between 91 to 97 degrees.

Remedies such as Contac and Alka-Seltzer have caused many tests to come up as a false positive, which is why you will need to know everything that your friend has consumed.

If you get caught tampering with your sample, you will automatically fail the drug test and then you will have to deal with the consequences associated with the drug test that you were taking. If the tester requires another sample, they may require a certain amount of urine to test and if you are not able to supply enough, you may fail the test as well.

There's the old wives' tale that a guy went in and substituted a girl's urine. The doc rang him when he got the results and said, " Sir I have some bad news. The sample came back clean for drugs... but I'm afraid you're pregnant."

My advice: clear the toxins from your system (typically by abstinence) before taking the test.

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15y ago

I suspect that when it was tested you would be asked if you feel a bit ruff.

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15y ago

No. It must be fresh for a definitive test.

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12y ago

yes they can only if the boy doesnt take drugs

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11y ago

if you do that the testers will find out

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12y ago

No not at all

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Wiki User

6y ago

no

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Q: Can a man use a boys urine to pass a drug test?
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