Yeah. Theres some studies on it.Ive had 2 false positives for methadone, one could of been actual methadone lingering (had a *[prescribed]* dose of methadone about a week before test but the other time was weeks later , and was only on methadone for about 10 days before switching to buprenorphine/subutex) and was tested weeks later. * Our studies suggest that a Kratom metabolite can cause false positive results in the Thermo Scientific CEDIA Methadone Metabolite (EDDP) immunoassay. Kratom use s