<unk> , a water soluble benzylpenicillin,itis bactericidal against penicillin-susceptible microorganisms during the stage of active multiplication.  Penicillin G is typically given parenterally, bypassing the intestines, because it is unstable in the highly acidic stomach. Because the drug is given parenterally, higher tissue concentrations of penicillin G can be achieved than is possible with phenoxymethylpenicillin.  These higher concentrations translate to increased antibacterial activity.
Penicillin G sodium
Penicillin G potassium
Penicillin V potassium
Piperacillin sodium
Ampicillin Trihydrate
Polymyxin B sulfate
Oxytetracycline hydrochloride
Penicillin G benzathine