What does negative drug test mean?

A negative drug test result generally means that testing did not detect the presence of a targeted drug (or its metabolites) in a particular sample.

What drugs cause false positive for cocaine? Pain relievers such as Advil, Nuprin, Midol, Trendar, or any medicine containing ibuprofen cause false positives for marijuana. Antibiotics such as amoxicillin or ampicillin cause false positives for cocaine.

What drugs cause false positive for amphetamines? Some more commonly prescribed prescription medicines that may cause a false positive reading for amphetamines include: Amantadine, Bupropion, Chlorpromazine, Desipramine, Dextroamphetamine, Ephedrine, labetalol, Methamphetamine, Methylphenidate, Phentermine, Phenylephrine, Promethazine, Pseudoephedrine, Ranitidine, Selegiline,…

What can cause a false positive for a benzo? There are multiple medications that are known to cause “false positives” for “benzos”, also known as benzodiazepines. Common benzodiazepines include: Xanax (Alprazolam) Librium (Chlordiazepoxide) Onfi (Clobazam) Klonopin (Clonazepam)

What does false positive drug screen mean? In drug screening, a “false positive” means that a sample is falsely reported as positive even if it is actually drug-free. Conversely, a “false negative” means that a sample is reported negative despite the donor actually having taken drugs prior to the test.