Penicillin G
Pfizerpen is a brand-name injectable antibiotic containing penicillin G potassium, a natural penicillin used to treat serious bacterial infections. It is typically administered in healthcare settings when oral antibiotics are not appropriate or sufficient.
Pfizerpen is an injectable penicillin antibiotic used to treat serious bacterial infections in settings where IV or IM administration is needed.
Key facts at a glance
- RxNorm
- 8096
- Generic
- Pfizerpen
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treats various serious infections including respiratory tract infections, skin and soft tissue infections, syphilis, meningitis, and other infections caused by susceptible bacteria. Often used in hospital settings for more severe infections.
As a beta-lactam antibiotic, it inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins, ultimately leading to bacterial cell death.
Administered by intravenous or intramuscular injection by healthcare professionals. Requires allergy assessment prior to use as penicillin allergy can cause serious reactions. May interact with other medications and requires appropriate monitoring during treatment.
Official drug label
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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 July 26, 2026. · Read our editorial policy