pneumococcal vaccine (Pneumovax 23, Pnu-Imune 23)

  • Pharmacy Author:
    Omudhome Ogbru, PharmD

    Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.

  • Medical and Pharmacy Editor: Charles Patrick Davis, MD, PhD
    Charles Patrick Davis, MD, PhD

    Charles Patrick Davis, MD, PhD

    Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.

What is pneumococcal vaccine-injection, and how does it work (mechanism of action)?

Pneumococcal vaccine is used for prevention of pneumonia. This pneumococcal vaccine contains chemicals (polysaccharides) extracted from 23 types of Streptococcus pneumonia bacteria. Upon injecting pneumococcal vaccine, our body recognizes these chemical as foreign and produces antibodies to destroy the chemicals. Antibodies are blood protein that help the body fight infection and destroy other harmful substances. Once produced, these antibodies destroy injected Streptococcus pneumonia chemicals. However, the antibodies remain active in the body and can detect the same chemicals from live Streptococcus pneumonia in the future. If a vaccinated person comes in contact with Streptococcus pneumonia the antibodies will destroy the bacteria and prevent pneumonia or reduce its severity. The FDA approved pneumococcal vaccine polyvalent in June 1983.

This vaccine should not be confused with pneumococcal conjugate vaccine (PCV13) used in special conditions (children <5 years old, for example) because often in the medical literature the non-specific term "pneumococcal vaccine" is used.

What brand names are available for pneumococcal vaccine-injection?

Pneumovax 23, Pnu-Imune 23

Is pneumococcal vaccine-injection available as a generic drug?


Do I need a prescription for pneumococcal vaccine-injection?


What are the side effects of pneumococcal vaccine-injection?

Common side effects of pneumococcal vaccine are:

  • Injection site pain
  • Redness
  • Soreness
  • Tenderness

Other side effects include:

Severe allergic reactions may occur.

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