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Phenytoin Dilantin Blood Test

* This is not a home test kit. You will need to visit a local lab for testing.

The Purpose of a Dilantin Level Test

Dilantin is a brand-name version of the generic phenytoin medication that’s prescribed to prevent certain types of seizures (generalized tonic-clonic, complex partial, and simple partial). If you are on this medication, you’ll want to make sure you are taking the proper dose, not just to ensure it’s working but also to prevent potential side effects and health concerns. For instance, phenytoin can disrupt the body’s processing of folate, which can interfere with red blood cell production and lead to a higher risk of macrocytosis anemia. A phenytoin test can help you keep tabs on your medication to ensure your health and well-being.

Phenytoin (Dilantin), Serum (713)
Phenytoin (Dilantin), Serum (007401)

What Does the Dilantin Lab Test Measure?

This test will show if your Dilantin levels are normal or if your dosage needs to be adjusted.

Who Should Take a Phenytoin Test?

You should get a Dilantin lab test if you are taking this medication, especially if you are experiencing side effects including:

  • Insomnia
  • Persistent headaches
  • Uncoordinated body or eye movements
  • Slurred speech
  • Atypical hair growth
  • Constipation
  • Enlarged lips or gums

Phenytoin Blood Test Preparation

You don’t need to do anything special before giving the sample for your phenytoin blood test. If you are on other medications, check with the lab to make sure they won’t interfere with your results.

Dilantin Blood Test Results

Typical results range from 10 to 20 μ/mL, though that can also vary depending on your individual circumstances. If your results aren’t within that range, your physician may want to readjust your dose or change your medication plan if needed. At Personalabs, we can also help if you need recommendations for your treatment plan. Book a telehealth appointment so you can consult with one of our board-certified doctors.

Where Can I Get a Dilantin Level Test Near Me?

Need a Dilantin blood test? You can find it online at Personalabs. Our comprehensive selection makes drug tests easy to purchase, and they’ll give you the fast, accurate results you need so you can make informed decisions that support your health and wellness. Our ordering process is simple (before you get started, just check to make sure you live in a state that doesn’t require a doctor’s approval to purchase a test):

Step 1: Buy the test you want and download the appropriate lab order.

Step 2: Find a conveniently located lab where you can schedule your blood test appointment. With Personalabs, you have access to more than 4,000 Quest Diagnostics or Labcorp facilities across the country; you can find the one closest to you with our lab locator tool.

Step 3: Go to the lab for your test appointment, bringing the downloaded test order with you.

Step 4: Get your results in your private Personalabs account, usually within 2 to 10 business days. Contact us and we will work with the lab where your testing occurred if you need to get the results by a specific date.

Blood tests are a vital health tool, and you can make the most of them when you shop at Personalabs.

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Order Your Test

Create an account, choose your tests, checkout securely, generate your lab order



Generate & Print Out Lab Order

Our physician network will approve your order within 2-4hrs.



Visit the Lab

The test price decides which lab you will visit: Quest or Labcorp. Find a location in your area.



Get Your Results

Results can be provided in as little as 24-48 hrs. For more complex tests, please contact us for turn around times.


Save up to
80% on meds!

We now offer pharmacy discounts through our PersonalabsRx platform.

We now offer pharmacy discounts through our PersonalabsRx platform.

Would you like to sign up for PersonalabsRx?

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