What's this test for?

This test is ideal if you're a transplant recipient taking tacrolimus and need to make sure your medication level is in the right range. Too much of this drug can cause side effects, while too little can raise the risk of organ rejection. Regular monitoring helps keep your dose safe and effective.

What happens after I get my results?

Your results will show up in your account with the normal range clearly explained so you can see where your level falls. If your tacrolimus level is outside the expected range, next steps typically involve retesting on a schedule to track how your dose is working, and if a value looks dangerously high or low, you should seek medical care right away. You can download a standard lab report from your account at any time, and the trends feature lets you track your levels over multiple tests to spot patterns.

Who should consider this test?

Anyone currently taking tacrolimus after an organ transplant should consider this test, especially soon after starting the medication or after any dose change. It's also useful if you've had recent changes in diet, other medications, or symptoms that might affect how your body processes the drug. Regular monitoring is a standard part of managing transplant medications long-term.

What symptoms indicate I may need this test?

Signs like unusual tiredness, tremors, headaches, swelling, high blood pressure, or stomach upset could mean your tacrolimus level is too high. On the other hand, symptoms of possible organ rejection such as fever, pain near the transplant site, or reduced organ function warrant checking if your level is too low. If you notice any of these changes, testing can help clarify what's going on.

When will I get my results?

Results are typically ready within about 7 days from when your sample is collected. This highly sensitive test requires specialized lab processing, which is why it takes a bit longer than routine bloodwork. You'll get a notification as soon as your results are posted to your account.

What does high tacrolimus mean?

A high tacrolimus level means there's more of the drug in your blood than intended, which raises the risk of side effects like kidney strain, tremors, high blood pressure, or infections due to over-suppressed immunity. This is often caused by a dose that's too high, interactions with other medications, or changes in liver function. If your level comes back high, this is a good time to review your medication schedule and any new drugs or supplements you've started.

What does low tacrolimus mean?

A low tacrolimus level means there may not be enough of the drug in your system to prevent your immune system from attacking the transplanted organ. This can happen if a dose is missed, absorbed poorly, or if the dose needs adjusting. A low result is a signal to act quickly, since under-treatment increases rejection risk.

What causes high or low tacrolimus levels?

Levels can shift due to missed or extra doses, taking the medication at inconsistent times, changes in diet (like grapefruit products, which interact with this drug), other medications that affect liver enzymes, or changes in liver or kidney function. Even switching between brand and generic versions can sometimes affect blood levels. Keeping a consistent routine with timing and diet helps keep results stable.

How often should I retest?

Retesting frequency depends on how recently you had your transplant and how stable your levels have been. Early after transplant or after any dose change, more frequent testing (weekly or biweekly) is common, while stable long-term patients may only need testing every few months. Tracking your results over time helps establish the right pattern for you.

What should I do if my results are abnormal?

If your result is outside the expected range, avoid making any medication changes on your own — instead, treat it as information to act on carefully and promptly. If your level is significantly high or low, or you're having symptoms like fever, severe tremors, or signs of rejection, seek medical care right away. Otherwise, use your results and the trends feature to keep a close eye on your pattern 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.

Tacrolimus Test - Transplant Drug Level 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]

Tacrolimus Blood Test for Transplant Medication Monitoring

Tacrolimus, Highly Sensitive, LC/MS/MS

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 happens after I get my results?

Who should consider this test?

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

Find a lab near you

Tacrolimus Blood Test for Transplant Medication Monitoring

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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