I just had a recent drug screening with a result of "substitution", what would cause this? I have ongoing urology and cardiac issues that I'm curretly undergoing testing for; I have chronic UIT's (since I was about 12, occurring at least oncce/month and frequently lasting several weeks or more) and I haven't been told the results of the cardiac testing yet, aside from MVP which I believe is fairly common in women. Also, my diet has been very poor the past few months too, I've been under a considerable amount of stress lately and have had the flu twice in two weeks so I have only been able to eat some cereals, breads, and drink milk without feeling sick to my stomache. Any ideas or cause for concern?
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