What's this test for?

This test is ideal if you're taking Interferon Beta-1 medication (used for conditions like multiple sclerosis) and your treatment doesn't seem to be working as well as expected. Over time, some people develop neutralizing antibodies that block the medication from doing its job. This test helps you find out if that's happening so you can have an informed conversation about your treatment plan.

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 result means for neutralizing antibodies. If your result is positive, a common next step is discussing whether a treatment adjustment makes sense, since the antibodies may be reducing how well the medication works. You can download a standard lab report from your account at any time, and if you get retested later, the trends feature lets you track changes over time.

Who should consider this test?

Anyone currently on Interferon Beta-1 therapy who has noticed their symptoms returning or worsening despite staying on treatment should consider this test. It's also useful for people who want a routine check to confirm the medication is still working the way it should. If you've been on this therapy for six months or more, checking for these antibodies is a common step.

What symptoms indicate I may need this test?

If symptoms that were previously controlled by your Interferon Beta-1 treatment start coming back, that's a key sign worth investigating. This might look like increased fatigue, new flare-ups, or a general sense that the medication isn't working like it used to. Any unexplained decline in treatment response while staying consistent with your medication schedule is worth checking.

When will I get my results?

Results are typically ready within about 7 days of your sample being tested at the lab. You'll get a notification once your results are posted to your account. This turnaround gives the lab enough time to run the specialized antibody detection process accurately.

What is a neutralizing antibody and why does it matter?

A neutralizing antibody is a protein your immune system sometimes makes that attaches to a medication and stops it from working properly. In the case of Interferon Beta-1, these antibodies can block the drug from doing its job of managing your condition. Knowing whether you've developed these antibodies helps explain why a treatment might stop working even when you're taking it exactly as directed.

What does a positive result mean?

A positive result means your body has developed antibodies that are interfering with your Interferon Beta-1 medication. This could explain why symptoms are returning or treatment feels less effective than before. It's a useful piece of information to bring into any decision about adjusting your treatment approach.

What causes the body to develop these antibodies?

Your immune system can sometimes recognize a medication like Interferon Beta-1 as foreign and build antibodies against it, especially with long-term use. This is a known, fairly common immune response and isn't caused by anything you did wrong. Genetics and how long you've been on the medication both play a role in whether this happens.

How often should I retest?

If your first result is negative but you later notice your symptoms changing, retesting a few months later is a reasonable step. For those already on long-term Interferon Beta-1 therapy, periodic retesting (roughly every 6-12 months) can help track whether antibody levels are developing or changing over time. Tracking results over time makes patterns easier to spot.

What should I do if my results are abnormal?

If your result comes back positive, it's worth documenting your current symptoms and how your treatment has been performing recently. This information becomes useful context when discussing whether your treatment plan should be adjusted. In the meantime, keeping a symptom log can help you notice patterns and communicate changes clearly.

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.

NAbFeron Antibody Test - Interferon Beta-1 Response 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]

NAbFeron Interferon Beta-1 Neutralizing Antibody Test

NAbFeron® (IFNΒ-1) Neutralizing Antibody Test

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

NAbFeron Interferon Beta-1 Neutralizing Antibody Test

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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