What causes a false positive test for marijuana i feel that the test is wrong and want to be retested

The : The list is fairly long - so i would you just goggle it. However, here is the deal. If your drug testing was done by a reputable lab, it is double tested. And normally it can be determined if the initial positive was acurate or not.

Many things: But what you have to ask is whether they did a confirmatory test. Screening tests have many false positives, and several prescription drugs can interact with the test for thc and give false positives. A positive screening test should always be followed by a confirmatory test, which pretty much always can distinguish between true and false positive. Esp. True if there are legal/social consequences.