What's this test for?

This test is ideal if you're an organ transplant recipient taking tacrolimus or sirolimus to prevent your body from rejecting the transplanted organ. It helps confirm your medication dose is in the right range - not too low (which risks rejection) and not too high (which can cause side effects like kidney problems). Your care team may order this regularly as part of ongoing transplant management.

What's included in this test?

This test measures the blood levels of two immunosuppressant drugs together, since transplant patients are often prescribed both to work as a team. Checking both at once matters because their combined levels affect how well your body tolerates the transplanted organ without triggering rejection or toxicity. Regular monitoring helps fine-tune your dose over time as your body's needs change.

What happens after I get my results?

Your results will show up in your account with each drug level compared to its normal therapeutic range, explained in plain language. If a level is outside the expected range, the report will note actionable next steps, such as timing your next dose differently or retesting sooner. You can download a standard lab report from your account at any time, and the trends feature lets you track your drug levels over multiple tests to see how they change.

How can I naturally support healthy immune balance?

While these medications must be taken exactly as prescribed, simple habits can support your overall health alongside them. Eating a balanced diet, staying hydrated, avoiding grapefruit and grapefruit juice (which can interfere with drug levels), and getting consistent sleep all help your body handle these medications better. Avoid starting new supplements or herbal products without checking, since many can change how these drugs are absorbed.

When will I get my results?

Results are typically ready within about 7 days of your blood draw. Because dosing decisions often depend on timely levels, try to schedule your draw consistently around the same time relative to your last dose, as instructed on your order confirmation. You'll get a notification as soon as your results are posted to your account.

Who should consider this test?

This test is meant for people currently taking tacrolimus, sirolimus, or both after an organ transplant. It's especially useful if your dose was recently changed, if you've started a new medication that could interact with these drugs, or if you're due for routine monitoring as part of your transplant care plan.

What symptoms indicate I may need this test?

Signs like unusual fatigue, swelling, changes in urine output, tremors, high blood pressure, or signs of infection can sometimes point to drug levels that are too high or too low. If you notice new or worsening symptoms after a dose change, checking your levels can help clarify what's going on. Always treat sudden severe symptoms as urgent and seek medical care right away.

What does high tacrolimus or sirolimus mean?

A level that's higher than the target range may mean your dose is too strong for your body right now, which raises the risk of side effects like kidney stress, tremors, or high blood pressure. This can happen due to interactions with other medications, changes in liver function, or missed instructions like eating grapefruit. If your result is high, follow the guidance on your report and consider retesting to confirm the trend.

What does low tacrolimus or sirolimus mean?

A level below the target range may mean the dose isn't strong enough to protect your transplanted organ from rejection, which is a serious concern. This can result from missed doses, taking the medication inconsistently, or interactions that speed up how your body clears the drug. If your result is low, this is worth addressing quickly through consistent dosing and follow-up testing.

How often should I retest?

Retesting frequency depends on how stable your dose has been - many people test more often right after a transplant or dose change, then less frequently once levels stabilize. Using the trends feature in your account can help you and your care routine spot patterns over time. As a general habit, retest whenever your dose changes or if you notice new symptoms.

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 & Sirolimus Test - Transplant Drug 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 and Sirolimus Blood Test for Transplant Patients

Tacrolimus and Sirolimus, 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's included in this test?

What happens after I get my results?

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

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Tacrolimus and Sirolimus Blood Test for Transplant Patients

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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