Home > Compliance Monitoring > Limits of Urine Toxicology Testing for Compliance
Urine drug testing remains the mainstay for identifying illicit or non-prescribed drug use for many reasons and is ideal for establishing recent drug exposure.1-2 Urine drug concentrations are typically much higher than those in corresponding blood (serum) samples and consequently allow a longer window of detection than blood.1-2 However, urine toxicology results cannot provide evidence of therapeutic effect and cannot be used to estimate dose.1-2 Multiple variables associated with drug disposition in the body induce highly variable drug-metabolite concentrations from a given dose.
Simply put, the presence of a drug in the urine only indicates use in recent days. So although a patient may test positive for a prescribed medication, a urine drug test result cannot tell the physician if the patient has been taking more or less than prescribed.
Click here to read our Q&A with Pain Live on the differences between urine and blood testing.
Click here to learn more about AIT's blood testing services.