Question - How long does mephedrone stay in your
2010-6-7 · Re: How long does MCAT stay in your system? swim assumes your friend actually took Mephedrone(4-MMC or MMCAT) rather than methcathinone (MCAT). No one actually knows how long mephedrone stays in someone's system but a good guess would be approx 3 or 4 days, but it could be longer or it could be shorter. however unless it is more than just a urine dipstick test and they are …
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