Serum/plasma concentration of valproate (antiepileptic drug)

Why This Test Matters

Valproate is a prescription medication used primarily to treat epilepsy and some mood disorders. Your doctor may order this test to check if your blood levels are within the safe range. Too little valproate may not control seizures effectively, while too much can cause serious side effects, including liver damage or neurological issues. Regular monitoring is important, especially if you’re taking other medications or have certain health conditions.

What to Expect Before the Test

No special preparation is needed for this test. You may have a small needle inserted into a vein in your arm, or a blood sample may be collected from a finger. If you’re taking valproate, your doctor may advise timing the test around your usual medication schedule. If you’re pregnant, breastfeeding, or have kidney or liver problems, let your healthcare provider know.

What the Results Mean

Results are typically reported as a concentration in micrograms per milliliter (mcg/mL) or milligrams per deciliter (mg/dL). Your doctor will interpret these results based on your medical history, symptoms, and other medications. If levels are too high, your doctor may adjust your dose or monitor you more closely. If levels are too low, they may increase your medication or switch to another treatment.

Common Causes of Abnormal Results

Several factors can affect valproate levels, including other medications (like aspirin or certain antibiotics), liver or kidney disease, dehydration, or changes in diet. If you experience unusual symptoms like dizziness, nausea, tremors, or unusual fatigue, contact your doctor promptly.