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would methiopropamine give false positive for meth on roadside drug tests?

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rob_benson1

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would methiopropamine give a false positive for methamphetamine on those standard urine tests where there is 2 lines? obviously no one could answer this from experience, but maybe one of the chemistry buffs could help speculate.

methiopropamine = N-methyl-1-(thiophen-2-yl)propan-2-amine

methamphetamine = N-methyl-1-phenylpropan-2-amine

I'm guessing that it's the phenyl additive in the methamphetamine molecule is what the drug test would look for, so the thiophen would be under the radar.
 
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Its certainly possible to have a false positive - then when it gets analyzed, they wouldn't find methamphetamine but its likely that they would bust you for amphetamines. It would be a hard case in court though considering that you wouldn't test under GC/MS for any of the known amphetamines.
 
Although I couldn't find any data on metabolism I would guess that it wouldn't show up in "roadside" drug tests. Common drugtests test for the metabolites p-hydroxymethamphetamine-sulfate and p-hydroxymethamphetamine-glucuronide. Since Methiopropamine has Thiophen ring it wouldn't convert into those 2 in the body you are on the safe side I guess. Don't take my word since I am not really deep in the material but it's pretty obvious that it wouldn't show.

Source for metaboiltes:
http://www.ncbi.nlm.nih.gov/pubmed/16702115
 
rob_benson1 said:
yup I was referring to urine tests, not reagant testing, thanks.
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I've got to know where on earth does roadside urine testing? Roadside drug testing is done using a saliva sample (a couple of samples if you show positive on the initial screen - the second sample is tested both on site and sent to the lab).
 
I meant roadside drug tests to differentiate from lab urine tests, not literally a piss test on the road.

my friend is on probation and he gets those kind of tests rather than the lab ones luckily.
 
rob_benson1 said:
I meant roadside drug tests to differentiate from lab urine tests, not literally a piss test on the road.

my friend is on probation and he gets those kind of tests rather than the lab ones luckily.
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;) I know exactly what you're referring too, the I in that sentence refers to the police officer. Again as the guy said above, where is this preformed?
 
geez have I really fucked up in my wording... the reason I used the term roadside tests over normal tests is because in another thread I asked this question but used the term 'drug test' and people thought I was referring to analysis

this makes me look great as a new poster with people thinking I'm a cop - cops would have resources like lab technicians and DEA chemists to give an answer to this question.

What exactly do you mean where is this being performed? Where is the piss testing taking place - canada though I doubt that's of any re-assurance.
 
rob_benson1 said:
geez have I really fucked up in my wording... the reason I used the term roadside tests over normal tests is because in another thread I asked this question but used the term 'drug test' and people thought I was referring to analysis

this makes me look great as a new poster with people thinking I'm a cop - cops would have resources like lab technicians and DEA chemists to give an answer to this question.

What exactly do you mean where is this being performed? Where is the piss testing taking place - canada though I doubt that's of any re-assurance.
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Uhh, ok. Just to get this straight, in Canada, you have to urinate in a cup if an officer thinks you're high on miscellaneous drugs?

I don't have any idea what your second paragraph refers to.

I guess to answer your question, we kinda need to know what a roadside drug test involves.

Only time a police officer in the USA accused me of being high he made me follow his finger and let me go. But I was high as 8o on opioids. I figured he'd notice. No peeing in a cup.
 
I think a roadside drugtest could be defined as anything wich doesnt involve further investigation in a lab, similar to a pregnancy hometest. Probably just some reagent that reacts with metabolites in the 1/0 manner not in a quantitative manner
 
^Xayo said:
I think a roadside drugtest could be defined as anything wich doesnt involve further investigation in a lab, similar to a pregnancy hometest. Probably just some reagent that reacts with metabolites in the 1/0 manner not in a quantitative manner
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Aside from breathalysers for alcohol here, the roadside drug tests don't measure quantity. It's an offence in its own right to drive with a number of different drugs in your system so if you test positive at the roadside you'll get a fine and you can't drive for 24 hours.

A sample is sent to the lab as well if you've tested positive on the first screen but negative on the second and it's on the basis of the lab test results that you're fined or your licence is suspended.
 
lol... here in australia we have saliva testing.

How the hell can they reasonably expect someone to get out of their car, and urinate on command?

And if you can't piss they what, arrest you for failing to provide the sample? LOL

I doubt this happens.

The way it works here is you come up to a checkpoint, they put a swab in your mouth - if it tests positive you're taken into the van, given a second swab, possibly a blood test - and that is sent to the lab for analysis. You're then banned from driving for 3-6hrs or something.
 
most likly would show a false positive for methamphetamine, seeing as its related.

a "road side drug screen/reagent screen" tests for amines of the primary, secondary and tertiarys.
 
blessedamines said:
most likly would show a false positive for methamphetamine, seeing as its related.

a "road side drug screen/reagent screen" tests for amines of the primary, secondary and tertiarys.
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So, psuedoephedrine would cause a false positive too, unless I'm missing something...
 
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