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a commonly used penicillin compound; it comprises 85% of the penicillin salts: sodium, potassium, aluminum, and procaine, with the latter exerting prolonged action on intramuscular injection, because of limited solubility. An antibiotic obtained from the mold Penicillium chrysogenum used orally and parenterally; primarily active against gram-positive staphylococci and streptococci; destroyed by bacterial β-lactamase.
penicillin G,, benzyl penicillin (ben'zil-pen'i-sil'in)
Synonym(s): penicillin G.