Penicillin g

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Information about Penicillin g[edit source]

Penicillin G and V are first generation penicillins that are used widely to treat infections due to susceptible organisms and have been linked rarely and only weakly with idiosyncratic liver injury.

Mechanism of action of Penicillin g[edit source]

Penicillin G benzathine, potassium, procaine and sodium are currently available in the United States in parenteral formulations for intravenous or intramuscular use. Penicillin V potassium (also called phenoxymethyl penicillin) is a more acid stable and can be administered orally. Both Penicillin G and V are available in multiple generic formulations.

Clinical use of Penicillin g[edit source]

The natural penicillins are indicated as therapy for mild-to-severe infections caused by susceptible organisms including (but not limited to) streptococcal infections and pneumonia, enterococcal and non-enterococcal endocarditis, diphtheria, anthrax, bacterial meningitis, Lyme disease, gonorrhea, syphilis, actinomycosis, botulism and others. The first generation penicillins are susceptible to inactivation by beta-lactamase, and resistance is relatively common. The usual doses of intravenous penicillin G are 300,000 to 4 million units every 6 to 8 hours.

Dosage and administration for Penicillin g[edit source]

  • Benzathine penicillin G is given in a one time dose of 2.4 million units intramuscularly as therapy of primary or secondary syphilis, and as three weekly doses for syphilis of longer duration; it is also used as prophylaxis against rheumatic fever.
  • Penicillin V is available in tablets of 250 and 500 mg and is usually given in doses of 250 to 500 mg every 6 to 8 hours for 7 to 20 days. It is also available as an oral solution.

Side effects of Penicillin g[edit source]

Side effects of penicillin G and V include nausea, diarrhea, gastrointestinal upset, headache, dizziness, rash and hypersensitivity reactions.


Penicillin antibiotics[edit source]

Penicillin g Resources

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Contributors: Prab R. Tumpati, MD