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Some are, but urine samples are more common.

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βˆ™ 14y ago
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βˆ™ 14y ago

You can. Blood in your urine won't affect the test...but you really need to get that looked at because you're not supposed to be peeing blood.

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βˆ™ 13y ago

It can be it all depends what drugs?....

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Q: Are drugs traced in a blood test?
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