What's this test for?

This test is ideal if you're currently taking tobramycin, an antibiotic used for serious bacterial infections, and need to make sure the medication is working at a safe level in your body. It helps check that the drug is high enough to fight the infection but not so high that it could harm your kidneys or hearing. This is typically ordered while you're on tobramycin treatment, not for diagnosing an infection itself.

What happens after I get my results?

Your peak and trough values will appear in your account with the normal therapeutic range explained so you can see where your levels fall. If your levels are outside the expected range, the report will note this, and you may need a dose adjustment or another round of testing to confirm your levels are back in a safe range. If a result is significantly high, it's important to seek medical care right away since this can signal a risk to your kidneys or hearing. You can download a standard lab report from your account anytime and use the trends feature to track your levels over multiple tests during treatment.

Who should consider this test?

Anyone currently being treated with tobramycin, especially for infections caused by bacteria like Pseudomonas, Klebsiella, or Staphylococcus, should consider this test. It's especially important if you're on a longer course of treatment, have existing kidney concerns, or are taking other medications that might affect how your body processes the drug. Repeated monitoring helps catch problems early before they become serious.

What symptoms indicate I may need this test?

If you notice ringing in your ears, dizziness, changes in urination, swelling, or unusual fatigue while taking tobramycin, these could be signs your drug levels need to be checked. Reduced urine output or unexplained hearing changes are especially important to flag quickly. These symptoms don't always mean something is wrong, but testing gives clear answers instead of guessing.

When will I get my results?

Results are typically available within about 7 days of your blood draw. Because tobramycin levels can change quickly in the body, timing of the blood draw relative to your dose matters a lot for accurate results, so results are processed as soon as the sample reaches the lab. You'll get a notification when your report is ready to view in your account.

What is tobramycin and why does peak and trough monitoring matter?

Tobramycin is a strong antibiotic used to fight serious bacterial infections, but it can build up in your body and affect your kidneys or hearing if levels get too high. "Peak" measures the highest drug level shortly after a dose, while "trough" measures the lowest level right before the next dose. Checking both numbers helps make sure the dose is strong enough to work but not so high that it becomes risky.

What does a high tobramycin trough level mean?

A high trough level means the drug isn't clearing out of your body fast enough before your next dose, which can raise your risk of kidney or hearing damage over time. This is more common in people with reduced kidney function or those on higher doses. Staying well hydrated and keeping track of dose timing can help, but a high result should be addressed quickly since it may require a dose change.

What does a low tobramycin peak level mean?

A low peak level means the drug may not be reaching a high enough concentration to effectively fight the infection. This can happen if a dose is missed, taken incorrectly, or if the body processes the drug faster than expected. If your peak is low, retesting after a dose adjustment is a common next step to make sure the treatment stays effective.

How often should I retest tobramycin levels?

Retesting frequency depends on how long you're on tobramycin and how your kidneys are functioning, but it's common to recheck levels every few days during treatment, especially early on or after any dose change. People with kidney concerns or longer treatment courses often need more frequent checks. Your trend data in your account can help you and your care team spot patterns over time.

What should I do if my results are abnormal?

If your levels are outside the safe range, don't skip or change your dose on your own — instead, watch for symptoms like reduced urination, hearing changes, or dizziness and seek medical care if these occur. Staying hydrated and following the exact dosing schedule can help keep levels stable between tests. Retesting after any adjustment is the best way to confirm your levels have returned to a safe range.

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.

Tobramycin Peak & Trough Test - Antibiotic Level 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

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