Serum/plasma concentration of total and individual cytochrome P450 enzymes (specifically CYP1A2, CYP2C19, CYP2C9, CYP2D6, CYP3A4/5) using a multiplex immunoassay

What This Test Measures

The test evaluates multiple cytochrome P450 enzymes (CYP1A2, CYP2C19, CYP2C9, CYP2D6, and CYP3A4/5), which are critical for breaking down drugs, hormones, and toxins in your liver. These enzymes vary in activity among individuals, affecting how quickly or slowly medications are metabolized.

Why It Matters for Medication Safety

Cytochrome P450 enzymes play a major role in drug metabolism. Variations in their activity can lead to either too much or too little of a drug in your system, increasing the risk of side effects or reduced effectiveness. This test helps identify which enzymes are active, guiding doctors to adjust medications for optimal results.

Common Uses in Clinical Practice

This test is often used in patients taking medications that rely heavily on these enzymes, such as antidepressants, blood thinners, or anti-seizure drugs. It’s particularly useful for those with liver conditions, genetic variations, or those taking multiple drugs to avoid interactions.

How the Test Works

The test uses a specialized immunoassay to detect and quantify the activity of multiple cytochrome P450 enzymes in your serum or plasma. This method allows for a comprehensive snapshot of how your body processes certain drugs and substances.