Penicillin G Pot — Compare Prices at US & Canada Pharmacies

Penicillin G potassium in dextrose is a ready-to-use premixed IV bag form of aqueous penicillin G potassium (brand Pfizerpen) — the same fast-acting formulation used for serious infections requiring rapid, high-dose penicillin, supplied pre-dissolved in a dextrose solution rather than as a powder vial a pharmacist reconstitutes. Hospitals use these premix bags to skip a compounding step for routine, weight-based doses, which reduces preparation errors; a powder vial may still be used when a dose falls outside the bag's fixed strength.

Everything that applies to standard IV penicillin G applies here: it's used for bacteremia, endocarditis, meningitis, pneumonia, and other serious infections caused by penicillin-susceptible organisms, and it's distinct from the long-acting benzathine formulation (Bicillin L-A), which is never given IV and is built for slow release over weeks rather than immediate high blood levels. Because this is the potassium salt, high continuous IV doses carry a dose-dependent risk of raising blood potassium to dangerous levels, particularly in patients with reduced kidney function — a reason electrolytes are monitored during high-dose therapy. Hypersensitivity reactions, from rash to anaphylaxis, remain the most important safety concern across all penicillin G formulations, and patients treated for syphilis or other spirochete infections can develop a Jarisch-Herxheimer reaction (fever, chills, transient low blood pressure) within hours of the first dose.