What's this test for?

This test is ideal if you're experiencing possible allergic reactions after taking penicillin-type antibiotics, like hives, itching, swelling, or breathing trouble. It measures your immune system's IgE antibody response to penicilloyl G and V, the two main substances in penicillin that trigger allergic reactions. It's especially useful if you're not sure whether a past reaction was truly a penicillin allergy or something else.

What's included in this test?

This panel checks your IgE antibody response to two specific forms of penicillin allergens, which matters because different formulations can trigger different levels of reaction in different people. Testing both forms gives a more complete picture than checking just one, since some people react to one type but not the other.

What happens after I get my results?

Your results will show up in your account with each value explained alongside its normal range, so you can see exactly where you fall. If your levels come back elevated, the report will walk you through what that means and suggest avoiding penicillin-based antibiotics until the result is discussed further; if a reaction is severe or you have symptoms like swelling of the throat or trouble breathing, seek emergency medical care right away. You can download a standard lab report from your account at any time, and if you're retested later, the trends feature lets you track changes over time.

How can I naturally support a healthy immune response?

While you can't change an existing allergy through lifestyle changes, you can support your overall immune balance with a nutrient-rich diet, good sleep, and stress management, since chronic stress can make allergic symptoms feel worse. Staying well-hydrated and avoiding unnecessary antibiotic use in general also helps keep your immune system from becoming overly reactive. If you know you're allergic, the most effective step is simply avoiding penicillin-based medications and carrying documentation of your allergy.

When will I get my results?

Results are typically ready within about 7 days of your lab visit. You'll get a notification once they're posted to your account, where you can view the detailed report and download it whenever you need it.

Who should consider this test?

This test is a good fit for anyone who has had a suspicious reaction after taking penicillin, amoxicillin, or related antibiotics and wants clarity before their next prescription. It's also useful for people who were labeled 'penicillin allergic' as a child but aren't sure if that's still accurate, since many childhood allergies fade over time. It's a helpful option if skin testing isn't practical, such as if you have widespread skin conditions or are currently on antihistamines.

What symptoms indicate I may need this test?

Common signs include hives, itchy skin rashes, swelling of the lips or face, or wheezing shortly after taking a penicillin-type antibiotic. More serious symptoms like throat tightness, difficulty breathing, or dizziness after taking the medication are especially important to flag. If you've had any of these reactions in the past, this test can help confirm whether penicillin was truly the trigger.

What does a high result mean?

A high IgE result for penicilloyl G or V suggests your immune system has developed a sensitivity to that form of penicillin, meaning you could be at risk for an allergic reaction if exposed again. It doesn't necessarily predict how severe a future reaction would be, but it's a signal to avoid that antibiotic going forward. Keeping a record of this result and mentioning it before any future prescriptions is an important next step.

What causes a high or low result?

A high result usually reflects prior exposure to penicillin that triggered your immune system to build allergy-specific antibodies, sometimes from a single dose or repeated use over time. A low or negative result generally means your immune system hasn't developed this specific antibody response, though it doesn't completely rule out a reaction risk in every case. Factors like how recently you were exposed and individual immune variation can also influence results.

How often should I retest?

Allergies can change over time, especially those first identified in childhood, so retesting every few years or before starting a new course of the medication can be worthwhile if your history is uncertain. If you've had a confirmed severe reaction, retesting isn't usually necessary since avoidance is the safest approach. Talk through your specific situation using your results history in the trends feature to decide what timing makes sense for you.

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.

Penicillin Allergy Test - IgE Antibody Blood 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]

Penicillin Allergy Blood Test (Penicilloyl G and V)

Penicilloyl G and V Profile

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.

Find a lab near you

Penicillin Allergy Blood Test (Penicilloyl G and V)

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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