What's this test for?

This test is ideal if you're being treated with vedolizumab for ulcerative colitis or Crohn's disease and your symptoms have started coming back or aren't improving as expected. It checks whether your body has built up antibodies against the drug, which can make the medication less effective. This is useful information if you and your care team are trying to figure out why a treatment that used to work seems to be losing its effect.

What's included in this test?

This test measures anti-drug antibodies that your immune system may produce in response to vedolizumab therapy. Detecting these antibodies matters because their presence can be linked to lower levels of active drug in your blood, which may explain reduced symptom control.

What happens after I get my results?

Your results will show up in your account along with an explanation of what a positive or negative antibody result means. If antibodies are detected, a common next step is retesting or tracking trends over time to see if levels are rising, since this can affect how well the drug keeps working. You can download a standard lab report from your account at any time, and the trends feature lets you compare this result to future tests to spot changes early.

How can I naturally support gut health during biologic treatment?

While antibody development is an immune response that lifestyle changes can't reverse on their own, supporting your gut can still help you feel better overall. Eating a fiber-rich, anti-inflammatory diet, staying hydrated, managing stress, and getting consistent sleep can ease digestive symptoms and support general immune balance. Avoiding smoking and limiting alcohol are also commonly recommended for people managing inflammatory bowel disease. These steps work alongside your treatment plan, not as a replacement for it.

When will I get my results?

Results are typically ready within about 7 days of your blood draw. Once processed, they'll be posted directly to your secure online account, where you can view the value and what it means. You'll be able to see exactly when your results are ready by checking your account status.

Who should consider this test?

This test is meant for people currently receiving vedolizumab infusions for ulcerative colitis or Crohn's disease, especially if symptoms have returned after an initial period of improvement. It's also useful if a recent check showed lower-than-expected drug levels in your blood. People whose treatment seems to be working well typically don't need this test unless a flare-up occurs.

What symptoms indicate I may need this test?

Signs that a vedolizumab antibody test might be helpful include the return of diarrhea, abdominal pain, cramping, blood in the stool, or fatigue after a period of feeling stable on treatment. Unexplained weight loss or a general sense that your usual treatment isn't controlling symptoms the way it used to are also reasons to consider testing. These changes can suggest that antibodies are interfering with how well the drug works.

What does a positive antibody result mean?

A result above 15 ng/mL means your immune system has produced antibodies against vedolizumab. This can lower the amount of active drug circulating in your body, which may reduce how well it controls inflammation. It doesn't automatically mean the drug has stopped working, but it's a signal worth tracking alongside your symptoms.

What causes antibodies to develop against vedolizumab?

Antibody development happens when the immune system recognizes the therapeutic antibody as foreign and mounts a response against it, similar to how it would respond to a virus or bacteria. Vedolizumab is known for being only mildly immunogenic, so this happens in just a small percentage of people who take it. Factors like inconsistent dosing or longer gaps between infusions may increase the chance of antibody formation in some patients.

How often should I retest for vedolizumab antibodies?

Retesting is usually considered when symptoms return after a period of stability, or when a routine check shows a drug trough level lower than expected. There's no fixed schedule for everyone since it depends on your individual treatment response. Tracking results over time using the trends feature in your account can help identify patterns that are worth discussing further.

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.

Vedolizumab Antibody Test - Crohn's & Colitis Treatment Check

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]

Vedolizumab Antibody Test for Crohn's & Colitis Patients

Vedolizumab Anti-drug Antibody

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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Vedolizumab Antibody Test for Crohn's & Colitis Patients

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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