Serum/plasma concentration of minocycline (mass concentration)
This test measures the amount of minocycline, a antibiotic medication, in your blood. It helps your healthcare provider assess drug levels to ensure proper dosing and monitor for potential toxicity.
["This test helps check if your minocycline levels are within safe and effective ranges."]
Key facts at a glance
- LOINC
- 73264-4
- Short code
- Minocycline ind plt IgM SerPl Ql FC
- Synonyms
- Minocycline ind plt IgM SerPl Ql FC
- Category
- hematology
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- flow-cytometry
- CPT
- 82784
- 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 doctor may order this test if you’re taking minocycline (an antibiotic) to confirm your blood levels are appropriate. It’s particularly useful for long-term use or when adjusting your dose. This helps prevent side effects like kidney damage or low blood cell counts while ensuring the medication works properly.
What to Expect Before the Test
No special preparation is needed. You may have a blood draw from a vein in your arm, similar to other routine blood tests. If you’re on anticoagulants (blood thinners), let your doctor know before the test.
What the Results Mean
Results show the concentration of minocycline in your blood. While reference ranges vary by lab, lower-than-expected levels may indicate insufficient medication, while very high levels could signal toxicity. Your doctor will interpret results in the context of your treatment plan.
Common Reasons for Testing
Doctors may test minocycline levels if you’re taking it for infections like acne, rosacea, or certain bacterial infections. It’s also used in cases where the drug is being adjusted for effectiveness or side effects.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Minocycline levels help prevent overdosing or underdosing. High levels can cause side effects like nausea, kidney issues, or nerve damage, while low levels may mean the infection isn’t fully treated. Regular monitoring is especially important for patients with kidney problems or those taking other medications that interact with minocycline.
Short name
Minocycline Level
Frequently asked questions
What causes minocycline levels to be checked regularly?
How often should I expect this test?
Can I eat or drink before this 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