Oxycodone concentration in plasma or serum

Why Is This Test Done?

Your healthcare provider may order this test if you’re taking oxycodone regularly, experiencing symptoms like confusion, slow breathing, or unusual drowsiness, or if you’ve been exposed to oxycodone in another way (e.g., accidental ingestion). It can also be used to monitor compliance with treatment or detect misuse.

What Does the Test Involve?

A blood sample is taken from a vein in your arm. The sample is then sent to a lab to measure the oxycodone concentration using a sensitive detection method, often a type of immunoassay or chromatography.

What Should You Expect Before the Test?

No special preparation is usually needed, but avoid eating or drinking anything for at least 8 hours before the test if instructed. If you’re taking other medications, let your provider know to avoid potential interactions.

What Are Common Results?

Results are reported as the concentration of oxycodone in nanograms per milliliter (ng/mL) or micrograms per milliliter (µg/mL). These values can vary based on factors like dosage, metabolism, and time since last dose. Your provider will interpret the results in the context of your medical history and symptoms.