Methadone spiked urine?

I need urine to have just methadone in it. I need to know how much of a 40 waffer to desolve and put in a small amount of clean pee. I know the matabolized by product edde wont be present, but that is ok cause I really dont think they will check that well.
Thanks

 

I think what they are testing for is the metabolites from the drug, not the drug itself. Though I'm not 100% positive, I seriously doubt dissolving a wafer in one's piss will force a positive screening.

 

from what I have read(not on forums) urine can be spiked with methodone. First/cheapest test used just checks for the methadone, a second test can be used to check for the matablized by product edde.