NAFCILLIN SODIUM vs PENICILLIN G POTASSIUM

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 16, 2026·How we rate

Possible drug interaction. NAFCILLIN SODIUM and PENICILLIN G POTASSIUM are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	NAFCILLIN SODIUM	PENICILLIN G POTASSIUM
Rating	New	56/100
Pharmacy pays	—	—
Type	RX	RX
Active ingredient	NAFCILLIN SODIUM	PENICILLIN G POTASSIUM
Manufacturer	Fresenius	Teva
Dosage forms	Injectable	Injectable, Solution
Drug class	Penicillin-Class Antibacterial	Penicillin-Class Antibacterial
Boxed warning	None	None
Treats	Cellulitis, Bacterial Endocarditis, Osteomyelitis	Actinomycosis, Anthrax, Botulism

nafcillin sodium penicillin g potassium

Rating

New

56/100

Pharmacy pays

—

Type

Active ingredient

NAFCILLIN SODIUM

PENICILLIN G POTASSIUM

Manufacturer

Fresenius

Teva

Dosage forms

Injectable

Injectable, Solution

Drug class

Penicillin-Class Antibacterial

Boxed warning

None

Treats

Cellulitis, Bacterial Endocarditis, Osteomyelitis

Actinomycosis, Anthrax, Botulism

Frequently asked questions

What is the difference between Nafcillin Sodium and Penicillin G Potassium?

Nafcillin Sodium contains Nafcillin Sodium, while Penicillin G Potassium contains Penicillin G Potassium — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.