drug tests? (Methylphenidate concerta ritalin methamphetamine amphetamine)?

Question by xwilliams69x: drug tests? (Methylphenidate concerta ritalin methamphetamine amphetamine)?
ok if your gonna judge me about doing or abusing drugs just don’t even bother wasting your time typing. i am old enough to make my own decisions and i don’t want to read other people’s bitching or concerns you live your life your own way and ill do the same. i am hoping someone who has the knowledge about drugs and drug testing can answer my question. i am on probation for something that happened years ago and i am drug tested about ounce a week. i was drug tested when i was younger and passed all tests even though i smoked weed everyday. the reason for this is the lab the samples were sent to did not test for creatinine levels in my urine. which means i would drink a shit load of water piss midstream in the cup and fill it with a little bit of tap water to dilute the sample to the point where the marijuana was undetectable. unfortunately when i go to probation this trick does not work because they will not except an undetectable urine =( i have messed with aderall a few times in the past but it made me feel like shit when it wore off so i stopped doing it plus aderall is an amphetamine and will show up in my test. i can get concerta which is almost the same thing as ritalin aka Methylphenidate for free. the research i came up with does not i answer my question. i found that concerta does not come up in a standard or extended drug test BUT it sometimes comes up as a false positive for amphetamine or methamphetamine. i have no idea what people in the lab do with my urine but if i drink enough water before my test to dilute my urine just enough so its not too low or not too high will the concerta show up? what makes the drug come up as amphetamine or methamphetamine? i like the way the add pills make me feel not physically but how i interact better with people at work and how i have the urge to be more productive and do my best. this drug is really helping me which it is made to do but i can get sent away for it so please help me out if you can

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