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Drugs and Medicinal Substances

Penicillin

Antiinfective Agents for Systemic Use

Penicillins are a group of beta-lactam antibiotics originally obtained from Penicillium moulds, principally P. chrysogenum and P. rubens.

Facts
Drug Class
Beta-lactam antibiotic 2
Mechanism of Action
Inhibits penicillin-binding proteins, preventing cross-linking of bacterial cell wall peptidoglycans and causing cell lysis. 2
Approved Use
Treats bacterial infections susceptible to beta-lactam antibiotics. 2
First Approved / Isolated Year
1928 2
Significant Risk
Hypersensitivity reactions including rash and, rarely, IgE-mediated anaphylaxis; roughly ten percent of the population reports penicillin allergy. 2
Classification
ATC ClassSourced to the subject's own account
J: Antiinfectives for Systemic Use 1
Route of Administration
Oral 2
Route of Administration
Intravenous 2
Route of Administration
Intramuscular 2
Connections

Associated With

Discovered By

Source Penicillin (Wikipedia)

Long-Form Articles

Treats

Source Penicillin (Wikipedia)
Sources
1. Anatomical Therapeutic Chemical Classification System (Wikipedia)
WikipediaFirst-level anatomical group codes, Code J
Quote, First-level anatomical group codes, Code J
Antiinfectives for systemic use
View the Source
2. Penicillin (Wikipedia)
Wikimedia Foundation
  • Lead section
    beta-lactam antibiotics
  • Infobox, drug class
    beta-lactam antibiotics
  • Mechanism of action section
    inhibits penicillin-binding proteins
  • History section
    1928 by Scottish physician Alexander Fleming
  • Adverse effects section
    10% of the population claims penicillin allergies
  • Lead section, route-of-administration statement
    A number of natural penicillins have been discovered, but only two purified compounds are in clinical use: penicillin G (intramuscular or intravenous use) and penicillin V (given by mouth).
  • Lead section, route-of-administration statement (intravenous)
    A number of natural penicillins have been discovered, but only two purified compounds are in clinical use: penicillin G (intramuscular or intravenous use) and penicillin V (given by mouth).
  • Lead section, route-of-administration statement (intramuscular)
    A number of natural penicillins have been discovered, but only two purified compounds are in clinical use: penicillin G (intramuscular or intravenous use) and penicillin V (given by mouth).
View the Source
Frequently Asked Questions

How does penicillin kill bacteria?

It blocks cell wall cross-linking, so the bacterial cell lyses.

Penicillins are beta-lactam antibiotics. They inhibit penicillin-binding proteins, which prevents the cross-linking of bacterial cell wall peptidoglycans and causes cell lysis. The cited mechanism of action section describes this inhibition of penicillin-binding proteins.

Are many people really allergic to penicillin?

Roughly ten percent of people report a penicillin allergy.

The cited adverse effects section states that about 10% of the population claims penicillin allergies. The main adverse effects recorded for the drug are hypersensitivity reactions including rash and, rarely, IgE-mediated anaphylaxis.
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