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Tobramycin Serum/Plasma Mass Concentration (Dialysate Simulated)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of the antibiotic tobramycin in your blood or plasma, often checked if you’re receiving this medication to monitor its effectiveness and safety.

Quick summary

["Tobramycin levels help ensure you’re getting the right dose and avoid potential side effects."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
59380-6
Short code
Tobramycin p dialysis SerPl-mCnc
Synonyms
Tobramycin p dialysis SerPl-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you’re taking tobramycin, a medication used to treat serious bacterial infections. It helps track how much of the drug is in your blood to prevent toxicity or insufficient treatment.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or vein for a blood draw, which usually takes a few minutes. If you’re on dialysis, your provider may collect a sample from your dialysate fluid.

What the Test Results Mean

Results help determine if your dose needs adjustment. High levels may indicate too much medication, while low levels could mean the drug isn’t working well. Your provider will discuss these findings with you.

Potential Side Effects or Risks

Tobramycin can cause side effects like kidney damage, hearing loss, or allergic reactions. Regular monitoring helps manage these risks.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Tobramycin levels are critical for patients with infections resistant to other antibiotics. Optimal dosing prevents bacterial resistance and reduces the risk of toxicity, such as nerve damage or kidney strain. Close monitoring ensures the drug remains effective while minimizing harm.

Short name

Tobramycin Level (Serum/Plasma)

Frequently asked questions

What is tobramycin, and why is it tested?
Tobramycin is a powerful antibiotic used to treat serious bacterial infections, often in severe cases like pneumonia or urinary tract infections. Testing its levels ensures it’s working properly and avoids dangerous buildup in your body.
How often should I expect this test?
Your provider will schedule tests based on your treatment plan. Typically, it may be done weekly or as needed to adjust your dose.
Can I eat or drink before the test?
You can eat and drink normally unless instructed otherwise. Avoid caffeine or alcohol before the blood draw, as they may affect results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy