Specific IgE - Penicillin G
- Sample Type
- Standard
- Fasting
- No
- Unit
- kUA/L
This test detects IgE antibodies against the major/minor determinants of Penicillin G. It is used to assess the risk of immediate (Type I) hypersensitivity reactions, such as urticaria, angioedema, or anaphylaxis. Since many patients report penicillin allergies they do not actually have, this test helps in 'de-labeling' patients for better antibiotic stewardship.
Check Your Result
Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Sensitivity for Penicillin IgE is not 100%. A negative result does not rule out allergy, and skin testing or a graded oral challenge is often required for definitive clearance. Additionally, IgE levels to penicillin decrease over time; a patient may test negative years after an actual allergic event.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Specific IgE - Penicillin G:
Official Sources
Research & Guidelines
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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