Doctor insights on:
False Positives For Morphine
Great question: I think dilute urine is the most likely source for false negatives. I am not familiar with other substances outside of the cannabinoid class of compounds (some of the newer synthetics?) that will react with standard immunoassays. If one is concerned, however, about a false positive there is confirmatory testing that can determine for sure whether it was a false positive or not. ...Read more
A lot of products.: A screening drug test is not perfect. A site i would recommend for a list of over the counter medications and the associated false positives is: http://www.Askdocweb.Com/falsepositives.Html. ...Read more
False + test cocaine: You need to look at the specific test done and see what things give a false positive test. Not likely is my guess or they would have warned you. ...Read more
Not a problem: Generally members of the penicillin family of antibiotics and especially Amoxicillin may falsely produce a urine drug test positive for cocaine. Azithromycin is in a different antibiotic structural class and is not known to produce this false positive result. ...Read moreSee 1 more doctor answer
No: There is no evidence to conclude that. ...Read more
Pseudoephedrine: Yes, to stimulants such as meth, & also to ecstacy. ...Read more
No: I know of no research that shows xenical can cause a false-positive drug test. All xenical does is block some of the fat from your diet from being absorbed, thus decreasing your calorie intake. This shouldn't cause either a urine or a blood drug test to become positive. ...Read moreSee 1 more doctor answer
Yes: on screening tests (dipstick tests and other "first use" tests) but NOT on confirmatory tests. Any positive on a screening test should lead to a more sophisticated confirmatory test (usually gas chromatography/mass spectroscopy) which will tell the difference between pseudoephedrine and amphetamine. ...Read more
Uncommon: The current tests for chlamydia have an accuracy of over98%. ...Read more
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