What's this test for?

This test is ideal if you're taking phenobarbital for seizure control and need to make sure your dose is working correctly. It helps if you have concerns about your medication not controlling seizures well enough, or if you're experiencing signs of too much medication in your system, like excessive drowsiness or confusion. Checking your blood level helps confirm you're in the safe and effective range.

What's included in this test?

This test measures the amount of phenobarbital circulating in your blood. Because this medication has a narrow window between an effective dose and a toxic one, checking the actual blood level matters more than just tracking symptoms alone.

What happens after I get my results?

Your results will show up in your account along with the normal range so you can see exactly where your level falls. If your level is too low, it may mean your seizures aren't fully controlled and a dose adjustment could help; if it's too high, you may need to watch for side effects and consider retesting sooner. You can download a standard lab report straight from your account, and the trends feature lets you track your phenobarbital levels over multiple tests to see how they change over time. If your result is dangerously high or you're having severe symptoms, seek medical care right away.

How can I naturally support seizure management?

While phenobarbital levels are managed through your prescribed dose, you can support your overall seizure control with good sleep habits, since sleep deprivation can trigger seizures. Avoiding alcohol and staying consistent with your medication schedule also helps keep your blood levels steady. Managing stress and staying hydrated are simple daily habits that support overall nervous system health.

When will I get my results?

Results are typically ready within about 7 days of your blood draw. Once ready, they'll be posted directly to your online account where you can view and download them.

Who should consider this test?

Anyone currently prescribed phenobarbital for seizure control should consider this test, especially if it's been a while since your last level check. It's also useful if you've had a recent change in dose, started a new medication that could interact with phenobarbital, or noticed new symptoms like increased seizures or unusual drowsiness.

What symptoms indicate I may need this test?

Signs you may need this test include breakthrough seizures despite taking your medication, unusual drowsiness, slurred speech, poor coordination, or confusion. Any of these could mean your phenobarbital level is too low or too high. Getting a level check can clarify whether your dose needs attention.

What does a high phenobarbital level mean?

A high level can mean the medication is building up in your body faster than it's being cleared, which raises the risk of side effects like excessive sleepiness, slowed breathing, or poor coordination. This can happen due to liver function changes, interactions with other medications, or a dose that's too high for your body. If your level is significantly elevated and you're experiencing symptoms, seek medical care promptly.

What does a low phenobarbital level mean?

A low level often means the dose isn't providing enough seizure protection, which can show up as breakthrough seizures. This can happen if a dose is missed, if the medication isn't being absorbed well, or if the body is clearing it faster than expected. Staying consistent with your medication schedule and retesting can help confirm whether an adjustment is needed.

How often should I retest?

Retesting frequency depends on how stable your seizure control has been and whether your dose has changed recently. Many people on a stable, long-term dose retest periodically to confirm levels stay in range, while those with a recent dose change or new symptoms may need to check sooner. Using the trends feature in your account can help you and track how your levels shift between tests.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp). Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

Phenobarbital Level Test - Seizure Medication Monitoring

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]

Phenobarbital Blood Test - Seizure Medication Level Check

Phenobarbital

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

What's this test for?

What's included in this test?

What happens after I get my results?

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Phenobarbital Blood Test - Seizure Medication Level Check

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

1,000,000+ blood tests later, here's what our customers say