Considering a hair follicle drug test? Learn about how long drugs can be detected in the hair, which drugs can be identified, and how hair testing works.
Nicotine and cotinine tests detect evidence of nicotine in the body. Learn more about when these tests may be used and how to understand your test results.
Drug testing for marijuana is ordered by employers and other organizations. Learn about how long marijuana stays in your body and how testing is conducted.
Therapeutic drug monitoring is the measurement of drugs levels in the blood at timed intervals to maintain relatively constant levels and avoid toxicity.
Alcohol blood tests detect and measure alcohol use. Learn about types of alcohol blood tests, how testing is conducted, and how to understand your test results.
5-HIAA is a breakdown product of serotonin. The 5-HIAA test measures blood levels to help diagnose and monitors treatment for a carcinoid tumor that produces serotonin.