This test is used to measure the amount of opiates (opium) in urine. Opiates are nothing but central nervous system depressant. They are pain reliever but can be easily misused as drug abuse. Opiates helps the person relax, when injected it provides with adrenaline rush to the user. They can be obtained either by prescription or illegal methods. This test is used to check whether one is suffering from opiate overdose or not. This test is helpful to detect use of narcotics.