Josamycin Concentration in Serum (24-Hour Urine Strip)
This test measures the amount of josamycin, a type of antibiotic, in your urine over a 24-hour period. It helps doctors check how well your body is processing the medication.
["This test helps ensure your antibiotic is working properly and at the right level in your system."]
Key facts at a glance
- LOINC
- 41699-0
- Short code
- Josamycine Islt Grad strip
- Synonyms
- Josamycine Islt Grad strip
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- gradient-strip
- 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 josamycin (an antibiotic) to treat infections like bacterial pneumonia, skin infections, or certain types of diarrhea. It helps monitor how your body is handling the medication and whether it’s effective.
What to Expect Before the Test
You’ll need to collect all your urine for a full 24-hour period. Start by emptying your bladder completely at the beginning of the test (time zero). Then, collect every bit of urine you pass for the next 24 hours, including any you wake up with at night. Store the urine in a clean container and keep it refrigerated until you return it to the lab.
What Happens During the Test
No special preparation is needed beyond collecting your urine sample. The lab will analyze the urine strip to measure josamycin levels.
What the Results Mean
The results help your doctor determine if your antibiotic dose is appropriate. If levels are too low, your infection may not be fully treated. If levels are too high, you might experience side effects. Your doctor will discuss these results with you.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Josamycin is used to treat bacterial infections, and monitoring its concentration in urine helps prevent resistance and ensures proper dosing. Low levels may indicate insufficient medication absorption, while high levels could signal toxicity or improper dosing. This test is particularly useful in patients with kidney issues or those who need precise antibiotic management.
Short name
Josamycin in Urine (24-hour collection)
Frequently asked questions
What does a josamycin urine test measure?
Why is a 24-hour urine collection needed?
Can I drink water during the urine collection?
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