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There are five primary types of drug tests: urine, blood, hair, saliva, and sweat. Most common is the urine test which has the benefit of being inexpensive and less intrusive than the blood test.

There are two types of UDT: a screening test and a confirmatory test. The screening test uses an immunoassay to look for the parent drug and/or metabolite.

A drug screen is just that a "Screen". Drug screening is a cost-effective method to quickly review all samples. The screen cannot tell the difference between ibuprofen and the drug metabolite. For example, over 60% of screens that test positive for amphetamines later prove to be negative on a drug test.

There's no special drink or ingredient that will help to "flush" your system or cleanse you any better than water does. Take some vitamin B pills the day before your test to make your urine look yellow.

Drug interactions occurs when the effect of a particular drug is altered when it is taken with another drug, or with food. The Drug Interaction Checker explains the mechanism of each drug interaction, the level of significance of the interaction (major, moderate or minor), and in certain cases, can provide the recommended course of action to manage

A urine drug test, also known as a urine drug screen or a UDS, is a painless test. It analyzes your urine for the presence of certain illegal drugs and prescription medications.