What's this test for?

This test is ideal if you're currently taking the antibiotic gentamicin and need to make sure the amount in your blood is safe and effective. Gentamicin can be hard on the kidneys and ears if levels get too high, so checking both the peak (highest) and trough (lowest) levels helps confirm your dose is working without causing harm. It's commonly used for people being treated for serious bacterial infections.

What happens after I get my results?

Your peak and trough gentamicin levels will show up in your account along with the normal range for each value so you can see exactly where you stand. If either level falls outside the expected range, this usually means a dose adjustment may be needed, so it's important to act quickly and share the timing of your results with whoever is managing your antibiotic treatment. You can download a standard lab report straight from your account at any time. If you're on gentamicin for more than a few days, the trends feature lets you track how your levels change over time between doses.

Who should consider this test?

Anyone currently receiving gentamicin injections or infusions for a bacterial infection should consider this test, especially if treatment is expected to last more than a few days. It's particularly useful for people with kidney concerns, older adults, or anyone on higher doses, since these groups face a higher risk of side effects. Regular monitoring helps catch problems early before they become serious.

What symptoms indicate I may need this test?

If you're on gentamicin and notice ringing in your ears, dizziness, hearing changes, decreased urination, swelling, or unusual fatigue, these can be signs the drug is building up too high in your system. Reduced urine output or sudden weight gain can also point to kidney stress. Catching these symptoms early and getting tested can help prevent lasting damage.

When will I get my results?

Results are typically ready within about 7 days of your blood draw. Because gentamicin levels need to be checked at very specific times relative to your dose (right before the next dose for trough, and shortly after infusion for peak), it's important to have your blood drawn at the correct times as instructed. Your results will be posted to your account as soon as they're finalized.

How can I naturally support kidney health while on gentamicin?

While you shouldn't skip or adjust your prescribed antibiotic dose on your own, staying well-hydrated (unless told otherwise) can help support kidney function during treatment. Avoiding other medications that stress the kidneys, like certain over-the-counter pain relievers, is also a good idea during this time. Eating a balanced diet and getting enough rest can support your body's overall recovery while fighting the infection.

What does a high gentamicin level mean?

A high peak or trough level means the drug is building up more than expected in your bloodstream, which raises the risk of kidney damage or hearing problems. This can happen if the dose is too high for your body size or kidney function, or if doses are given too close together. If your level comes back high, treatment timing or dosing usually needs to be reassessed quickly.

What does a low gentamicin level mean?

A low peak level may mean the drug isn't reaching high enough concentrations to effectively fight the infection, which could make treatment less successful. This can happen if the dose is too small or if it's being cleared from your body faster than expected. A low trough is actually often the goal, since it helps protect against toxicity, but very low peaks paired with an ongoing infection may call for a dose review.

How often should I retest?

Peak and trough levels are usually rechecked every few days during gentamicin treatment, especially if your dose changes or treatment lasts longer than 3-5 days. People with kidney issues or those on long courses often need more frequent monitoring. Follow the specific retesting schedule given as part of your treatment plan.

What should I do if my results are abnormal?

If your gentamicin levels come back too high or too low, this needs prompt attention since it affects both safety and how well the infection is being treated. Watch closely for symptoms like hearing changes, dizziness, or reduced urination and seek medical care right away if these occur. Otherwise, use your results to inform an update to your dosing plan as soon as possible.

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.

Gentamicin Peak and Trough Test - Antibiotic 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

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