Originally Posted by Burnt Toast
Skip the aspirin. It was effective against only one type of test: the first-generation EMIT screen. Since then, a second-gen EMIT was introduced to counter the interference issues caused by aspirin. As a result, the first-gen EMIT is seldom used anymore (if, at all).
Theres always that possibility. When doing dilution techniques, you should have some validity test strips at hand so you can monitor your creatinine and SG levels (the two urine constituents tested in determining overdilution).
Do a Google search for drug adulteration test kits.