NAFCILLIN SODIUM vs PENICILLIN V POTASSIUM

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated June 7, 2026·How we rate

Possible drug interaction. NAFCILLIN SODIUM and PENICILLIN V 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 V POTASSIUM
Rating	New	New
Pharmacy pays	—	—
Type	RX	RX
Active ingredient	NAFCILLIN SODIUM	PENICILLIN V POTASSIUM
Manufacturer	Fresenius	Ivax Sub Teva Pharms
Dosage forms	Injectable	Powder, Tablet
Drug class	Penicillin-Class Antibacterial	Penicillin-Class Antibacterial
Boxed warning	None	None
Treats	Cellulitis, Bacterial Endocarditis, Osteomyelitis	Actinomycosis, Anthrax, Bacterial Infections

nafcillin sodium penicillin v potassium

Rating

New

Pharmacy pays

—

Type

Active ingredient

NAFCILLIN SODIUM

PENICILLIN V POTASSIUM

Manufacturer

Fresenius

Ivax Sub Teva Pharms

Dosage forms

Injectable

Powder, Tablet

Drug class

Penicillin-Class Antibacterial

Boxed warning

None

Treats

Cellulitis, Bacterial Endocarditis, Osteomyelitis

Actinomycosis, Anthrax, Bacterial Infections

Frequently asked questions

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

Nafcillin Sodium contains Nafcillin Sodium, while Penicillin V Potassium contains Penicillin V 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.