Dr bill or whoever,

Is the only way to administer a peth test through blood or can it be done with a urine test as well?

Blood only.

Quote:

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Originally Posted by DrBill100

Blood only.

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Thank you as for the length of time the test can go back is it over a month?
They say three or four weeks?

Quote:

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Originally Posted by peeweeinoc

thank you as for the length of time the test can go back is it over a month?
they say three or four weeks?

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That's debatable. Most sources say about 2 weeks but this test is little used there is no track record.