Serum/plasma concentration of risperidone (antipsychotic medication)

Why This Test Is Done

Your doctor may order this test if you’re taking risperidone to check if the dose is working properly or if your body is handling the medication as expected. It can also help detect if you’re experiencing side effects or if your levels are too high or too low.

What to Expect During the Test

A small blood sample will be taken from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause discomfort. The test itself takes only a few minutes.

What the Results Mean

Results are typically reported in nanograms per milliliter (ng/mL) or micrograms per liter (µg/L). While specific ranges vary by lab and patient, they help guide whether your dose needs adjustment. Your doctor will interpret these results in the context of your overall health and treatment plan.

Common Reasons for Testing

This test is often done during the initial prescription to establish baseline levels, after changes in dosage, or if you’re experiencing symptoms like dizziness, drowsiness, or unusual movements that might suggest medication levels are off.