Penicillin G (Penicilloyl G) Allergy (IgE)
A common antibiotic and one of the most frequent drug-allergy triggers.
Consider this test if:
- A past reaction to penicillin or amoxicillin that you want clarified
- Hives, swelling, or breathing trouble after taking a beta-lactam antibiotic
- Carrying a penicillin-allergy label and wanting to know whether it still holds
- Planning a procedure or treatment where antibiotic options matter
- HSA/FSA eligible
- Results delivered to your dashboard · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
No fasting required, and timing does not affect the result. Antihistamines do not interfere with blood IgE testing, unlike skin testing.
Video consult with your Care Team
A 1:1 call to discuss your health.
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What this test is for
Penicillin G is a widely used beta-lactam antibiotic, and penicilloyl G is its major allergenic determinant, the part of the molecule the immune system most often reacts to. This test measures IgE antibodies to penicilloyl G, the antibody class that drives immediate allergic reactions such as hives, swelling, and anaphylaxis. A positive result means sensitization, not a confirmed allergy: a true allergy requires symptoms that track with exposure, so the result is read against your reaction history. Many people labeled penicillin-allergic are not truly allergic, so this marker is useful when clarifying a past reaction matters for future antibiotic choices.
Biomarkers tested
Includes 2 biomarkers
- Specimen
- Serum
- Measures
- Concentration
- Specimen
- Serum
- Method
- Allergen-specific IgE
- Measures
- Presence / threshold
What to expect
- 1 Book instantly
Click, book, done. Choose a convenient lab location near you. Transparent, up-front pricing.
- 2 Quick lab visit
Testing to fit your busy schedule, usually 15 minutes or less. Walk-in and appointments available.
- 3 Fast, dashboard-delivered results
Your results post straight to your dashboard as soon as the lab completes them.
- 4 Expert guidance
Included with Mito membership. A clinician reviews your results and your personalized action plan follows, with clear next steps.
Everything your health needs,
in one membership
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Every test at our cost
Members pay our cost on every test, with lab fees passed straight through. The full receipt is itemized, never padded.
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Continuous tracking, all in one place
Upload past labs and watch your trends over time. Every marker and visit lives in one longitudinal record, so all your care stays together.
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Year-round clinician support
Text anytime and get clinician-reviewed answers. When you want to go deeper, 1:1 consultations are available at affordable rates.
All for $9/month
Order any test or consult without joining. For $9/month, members unlock member prices, trend tracking, and year-round clinician guidance.
Mito Membership
$9 /mo
cancel anytime
Without membership
$0
pay as you go
At-cost pricing on labs, scans, and more
Priority turnaround on your results
On-demand clinician consults when you need guidance
Personalized action plans across supplements, exercise, nutrition, and sleep
AI health coaching to help you act on your results
Year-round medical support, with in-chat clinician escalation
All your health records in one personal vault, with trends and biological age tracking
Early access to new diagnostics and product releases
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Frequently asked questions
View all FAQsHow does pricing work?
Every test shows the member price next to the standard non-member price, so you can see what membership saves you. The member price is our cost — covering the lab and what it takes to run the service — never a profit on the test itself; Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9/mo, and you still pay the lab’s order fee. Prices are itemized before you pay, with no hidden fees.
Where do I get tested?
Choose a partner lab (Quest, Labcorp, or BioReference) at checkout. If your cart spans multiple tests, we consolidate the whole order onto a single lab so you only make one visit.
Is this eligible for HSA/FSA?
Yes. This test is HSA/FSA eligible, and you can pay with your HSA/FSA card at checkout.
When will I get my results?
Your results post to your dashboard once your lab completes them, then a clinician reviews them and your full analysis and personalized action plan (with clear next steps) follow. Turnaround varies by test: specialty assays and at-home kits take longer, and each test shows its expected turnaround before you buy.
Do I need a doctor’s order?
No. Mito provides the lab order for you, so you can book and get tested without a separate doctor visit.
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