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Penicillin G
Pronounced pen-i-SIL-in JEE
Brand names: Pfizerpen
Type: Penicillin antibiotic · All Antibiotics & Infection Medicines
What Penicillin G is used for
- Syphilis
- Severe strep infections (hospital)
- Meningitis (hospital)
- Pneumonia (hospital)
◆ Kidney note
Dose is adjusted when kidney function is reduced.
Common side effects
- Pain at injection sites
- Diarrhea
- Nausea
- Rash
Important cautions
- True penicillin allergy can be life-threatening — always tell your care team about any past reaction
- Given only by injection, usually in hospital or clinic
How it comes
Injection (hospital or clinic). This guide lists forms only — it never lists strengths or doses.
Related medicines — Antibiotics & Infection Medicines
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.