Due to the farce that is cheap drug testing, the whole line of analogue, metabolite, familial chemicals and those that produce similar effect or share a vaguely similar structure factor into what is intended to be a test for only 1, 2, 4, 5, 6, 8, 10 or 12 substances (with typical urine screens anyway). The rumor mill says that Meprobamate (Miltown) and its prodrug Carisoprodol (Soma) cause false positives on a urine screen. Theres no evidence. Neither chemical is a Barbiturate or Benzodiazepine, even if they share some of the same characteristics in terms of their effect on the body. All I have been able to find online is a few random sites where people claim to have failed urine tests (EMIT generally) after taking Soma Or Miltown, without specifying what they failed for.

Anyone have experience with this? Ever fail for Soma or Miltown? Ever take a drug test that tested for Barbiturates and/or Benzodiazepines and pass after taking Soma or Miltown in the days leading up to the test?

I was able to find this:

Glutethimide (Doriden), ethchlorvynol (Placidyl), meprobamate (Miltown,
Equanil), methyprylon (Noludar), and ethinamate (Valmid) are sedative
drugs that can produce dependence and impaired function. Although they may
have some effects similar to those of the barbiturates, they are chemically
unrelated and must be detected with special procedures.

http://paranoia.lycaeum.org/war.on.drugs/drug.testing/drugs.of.abuse

But the article is very wrong about several facts (such as claiming a 10mg Valium taken just once may not be even detected on a Benzodiazepine screening, and that taking 50mg Valium a day for several days in a row would only be detectable for 3 or 4 days- when in reality a single dose of Diazepam can test positive on a Benzo screen up to 1 or 2 weeks in some people). This leads to me to question everything in the article. Though the logic is there.

Don't want to gobble these pills and take a urine test in a few days if they are going to cause a positive for Benzodiazepines or Barbiturates.

If no Benzo's or Barb's had been taken and lets say for the sake of argument Soma/Miltown DOES cause a false positive, would a GC/MS confirmation test only tell the test giver that it was a false positive, or would they reveal what the full contents of the urine were? Like, if the test says failed for Barbiturates, patient demands a confirmation test, would the results sent back to the test giver say (No Barbiturates Present) or (Meprobamate, Caffeine, Ibuprofen, etc whatever present in x amount per ml and so on)?

Anyone?