Valproic Acid Level (Sodium Valproate)

You should get a valproic acid level test when starting or changing your dose, if you have breakthrough seizures or mood symptoms, or if you show signs of toxicity such as drowsiness, confusion, tremors, nausea, or vomiting. It is also recommended when starting interacting medicines, during pregnancy, and to check whether you are taking the medicine regularly.

No fasting is required for a valproic acid level test. Give your sample just before your next scheduled dose (a trough level), usually in the morning. Take your medicine regularly for at least 3–5 days before testing, and don't skip or change your dose. Inform your doctor about all other medicines you take.

No, fasting is not required for a valproic acid level test. You can eat and drink normally before giving your sample. The important point is timing: the sample should be taken just before your next dose (a trough level). Don't skip or change your dose before the test unless your doctor advises it.