Drug testing products are more than 99 percent accurate in detecting specific drugs according to the designated cut-off levels. However, if a more sensitive test is administered, there is a chance of testing positive if drugs are present in urine.
There are several types of drug tests. Which includes hair test, urine drug test, blood test, saliva and sweat drug test. Types of hair drug testing drug testing least avoided. It can reveal previous drug use, but cannot effectively detect recent use.