There are many tests that can be utilized for testing Amphetamine in the body system. Some of the testing modalities include urine tests, hair tests, blood tests, and salivary tests. The detection period is quite variable among individuals depending on many factors like physical conditions, fluid intake, and method of use of drug.
This is the routinely employed modality of testing Amphetamine. The reason is the ease of collection and analysis of samples. Moreover, as the route of excretion is the kidneys so the window of detection is longer in cases of urinary tests. The clean-catch urine samples are collected and sent to the laboratory. The detection period of amphetamine is about 2 days, although in some cases it can extend up to 4 days. The initial cut-off value is 1000ng/ml.
It is another very useful modality in the case of Amphetamine. An adequate amount of oral fluid is collected and sent to the laboratory. The drug can be detected within few hours of the last consumption. With the oral administration of Amphetamine, salivary tests are more accurate. The detectability period stays up to 1 to 5 days, which is further based on the administered dose. The test loses its accuracy in cases of IV administration. Many new techniques are under research that can improve the precision of salivary tests.
These tests are not routinely performed for Amphetamine. There are reserved for acute or critical cases of overdose or intoxication. The advantage is the early detection and high accuracy associated with these tests. However, the biggest disadvantage is a short period of detection of about 12 hours. Blood tests are non-convenient as they are invasive and repeated sampling can be uncomfortable for the patient.
About 20-50 hair follicles from the head of a patient are collected and sent for analysis. The hair follicles should be at least 3 cm in length. The drug levels in hair samples correspond to the ingested amounts. This test cannot be utilized for detecting the recent ingestion as the drug takes some time to get accumulated. However, it has a long duration of detection and stays for up to 90 days. Hair testing is usually reserved for legal and postmortem cases.