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Prothionamide Concentration in Serum/Plasma

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

This test measures the amount of prothionamide, a medication used to treat certain bacterial infections like tuberculosis, in your blood.

Quick summary

["This helps doctors check if your dose is working properly."]

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

Key facts at a glance

LOINC
63565-6
Short code
Prothionamide Islt SlowMyco
Synonyms
Prothionamide Islt SlowMyco
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
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 prothionamide to treat infections like tuberculosis. It helps ensure the drug is at an effective level in your bloodstream without causing harmful side effects.

What to Expect Before the Test

No special preparation is usually needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re on anticoagulants, let your provider know to avoid unnecessary bleeding.

What the Results Mean

Results are typically reported as a concentration (e.g., micrograms per milliliter). While reference ranges vary by lab, your provider will interpret results based on your specific treatment needs and medical history.

Possible Side Effects or Risks

Blood tests are generally safe, but rare risks include bruising, mild pain, or infection at the needle site. If you experience severe reactions or unusual symptoms, contact your provider immediately.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Prothionamide Level

Frequently asked questions

How often should I get this test?
Your provider will determine the timing based on your treatment plan, but it’s often checked during the early and middle phases of therapy to ensure proper dosing.
What do abnormal results mean?
Abnormal results may mean your medication isn’t working as intended or you’re experiencing side effects. Your provider will discuss next steps, such as adjusting your dose or exploring alternative treatments.
Can I eat or drink before this test?
You can usually eat and drink normally unless instructed otherwise. Some tests may require fasting, but prothionamide levels don’t depend on food intake.
  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