Serum morphine concentration (mass concentration)

Why This Test Might Be Ordered

Your healthcare provider may order this test if you’re taking morphine for pain management, recovering from surgery, or managing a condition requiring opioid therapy. They might also check it if you experience symptoms like drowsiness, confusion, or respiratory issues that could indicate morphine overdose or improper metabolism.

What to Expect Before the Test

No special preparation is usually needed. You may be asked to fast for a few hours before the test if it’s part of a larger blood draw, but this depends on the clinic’s protocol. Bring any medications or supplements you’re taking to your appointment.

What Happens During the Test

A healthcare professional will draw blood from a vein in your arm. The blood sample is then sent to a lab for analysis using advanced techniques like high-performance liquid chromatography (HPLC) to measure morphine levels accurately.

What the Results Mean

Results will show the morphine concentration in your blood. While reference ranges vary by lab and clinical context, very high levels may suggest overdose, while very low levels could indicate poor absorption or metabolism of the medication.