Total Serum Erythromycin Concentration
This test measures the amount of erythromycin, an antibiotic, in your blood serum. It helps doctors assess how your body is responding to treatment with erythromycin.
["Erythromycin levels help determine effectiveness and potential side effects of antibiotic therapy."]
Key facts at a glance
- LOINC
- 61260-6
- Short code
- Erythromycin IgE/IgE total %
- Synonyms
- Erythromycin IgE/IgE total %
- 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 Might Be Ordered
Your healthcare provider may order this test if you’re taking erythromycin to treat infections like bacterial pneumonia, sinusitis, or certain skin infections. It can also be used to monitor levels in people with kidney or liver issues, who may need dose adjustments.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test is quick and typically done in a lab setting. Avoid eating or drinking for a short time before if instructed by your provider.
What the Test Results Mean
Results are compared to a standard range, but exact values can vary by lab. High levels may indicate poor absorption or kidney issues, while very low levels could suggest ineffective dosing. Your doctor will interpret results in the context of your medical history and treatment plan.
Common Reasons for Monitoring
Doctors may monitor erythromycin levels if you have kidney problems, liver disease, or are taking other medications that interact with antibiotics. It helps prevent side effects like nausea, diarrhea, or allergic reactions.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Erythromycin levels are critical for ensuring therapeutic effectiveness and minimizing risks. Low levels may mean the antibiotic isn’t working, while high levels can cause toxicity. This test helps tailor treatment to your specific needs, especially in patients with organ dysfunction or those on multiple medications.
Short name
Erythromycin Level
Frequently asked questions
How long does it take to get results from this test?
What does a low erythromycin level mean?
Can I eat or drink before this blood test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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