text: According to Jeff Nightbyrd, there is testing industry data that taking 4 aspirins a few hours prior to the test might help you. ". . . aspirin interferes with the Syvia [sic] EMIT assay. It seems that aspirin absorbs at the same wavelength that NAD does which is how it interferes with the assay" (Clin Chem 34 (90) 602-606). Two reliable sources have tested aspirin and found it to interfere with the EMIT. In the future they will try to find a way to circumvent this test flaw. Until then, I certainly recommend taking advantage of the situation and using aspirin