SERUM PHENYTOIN
The Serum Phenytoin test measures the level of phenytoin in the blood, a medication commonly used to control and prevent seizures (epilepsy). This test is essential to ensure that the drug concentration remains within the therapeutic range for effective seizure control without causing toxicity.
Low phenytoin levels may result in poor seizure control, while high levels can lead to toxicity with symptoms such as dizziness, unsteady movements, blurred vision, confusion, or drowsiness. Since phenytoin has a narrow therapeutic range and its metabolism varies among individuals, regular monitoring is important for safe and effective treatment.
The test requires a small blood sample, usually taken at a specific time after the last dose for accurate measurement. Reliable results help doctors adjust dosage, prevent side effects, and ensure optimal management of seizure disorders.