Can excess intake of water give false negative drug test?

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Welcome to icliniq.com. Two common potential causes for false negative opiate tests are using the wrong test for a specific opiate or having an insufficient concentration of an opiate in the sample. Other possible reasons can be due to dilution. For example, ingesting a substantial amount of water like you take or you are an ultrafast metabolizer. Urine drug test is widely used for testing Opioids and illicit drugs. There are two types of test, a screening test and a confirmatory test.The screening test uses an immunoassay to look for the parent drug or metabolite. Most screen for Marijuana, Cocaine, Opiates, PCP (Phencyclidine) and Amphetamines, while some also test for Benzodiazepines and Methadone. The confirmatory urine drug test is done by gas chromatography or mass spectrometry (GC/MS) or high-performance liquid chromatography (HPLC). This test is highly specific and is typically used when testing for the presence of a specific drug is needed. The common drugs tested are Amphetamines, Barbiturates,Benzodiazepines, Cannabinoids (THC - tetrahydrocannabinol, Marijuana), Clenbuterol,Cocaine,Codeine, Euphorics (Ecstasy), LSD (Lysergic acid diethylamide), Methamphetamines, Nicotine (Cigarettes), Opiates,Phencyclidine (PCP), Phenobarbital, and Steroids.