Ethionamide concentration in serum/plasma (24-hour urine collection)
This test measures the amount of ethionamide, a medication used to treat tuberculosis, in your urine over a 24-hour period. It helps your healthcare provider assess how well your body is processing the drug.
["This test helps monitor your tuberculosis treatment by checking drug levels in your urine."]
Key facts at a glance
- LOINC
- 25183-5
- Short code
- Ethionamide Islt Slgr Mcbct AB 11.0
- Synonyms
- Ethionamide Islt Slgr Mcbct AB 11.0
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- method-for-slow-growing-mycobacteria-antibiotic-concentration-at-ug-ml
- 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 ethionamide to treat tuberculosis. It helps ensure the medication is working properly and at the right level in your body. This is especially important for people with tuberculosis to prevent resistance to the drug.
What to Expect Before the Test
You’ll need to collect all your urine for a full 24 hours, starting after your first dose of ethionamide. Store the urine in a clean container and bring it to your lab appointment. Follow your doctor’s instructions carefully to ensure accurate results.
What to Expect During the Test
No special preparation is needed beyond collecting your urine sample. The lab will analyze the urine for ethionamide levels using a sensitive test.
Possible Results and What They Mean
Results will show the amount of ethionamide in your urine. Low levels may mean the drug isn’t working as intended, while very high levels could indicate issues with how your body processes it. Your doctor will interpret these results in the context of your treatment plan.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Ethionamide levels in urine are critical for tuberculosis treatment. Proper dosing ensures the drug reaches effective concentrations to kill the bacteria without causing excessive side effects. Monitoring helps prevent drug resistance and adjusts treatment if needed.
Short name
Ethionamide Level (Urine)
Frequently asked questions
What does a normal or abnormal result mean?
How often will I need this test?
Can I drink alcohol 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