Penicillin G sodium(Benzylpenicillin sodium) salt is a penicillin derivative commonly used in the form of its sodium or potassium salts in the treatment of a variety of infections. It is effective against most gram-positive bacteria and against gram-negative cocci. It has also been used as an experimental convulsant because of its actions on GAMMA-AMINOBUTYRIC ACID mediated synaptic transmission.

Penicillin G potassium (Benzylpenicillin potassium) is the potassium salt form of penicillin G, a broad-spectrum penicillin antibiotic.