Penicillin is a group of antibiotic which is defined as a group of natural or semi-synthetic
antibiotics derived from fungi strains of the genus Penicillium.
Generally, all penicillin share a three-carbon, one-nitrogen, and
four-member cyclic amide structure, known as the beta-lactam ring.
2. What are the Penicillin drugs?
The Manual of Clinical Microbiology, 9th edition, identifies penicillin drugs as follows:
Natural Penicillins:
Benzylpenicillin* (commonly known as penicillin G)
Benzylpenicilloyl-polylysine (BPP)
Phenoxymethyl penicillin* (commonly known as penicillin V)
Semi-synthetic Penicillins:
Methicillin
Nafcillin
Cloxacillin*
Dicloxacillin*
Ampicillin*
Amoxicillin*
Bacampicillin
Pivampicillin
Carbenicillin
Ticarcillin*
Azlocillin
Mezlocillin
Piperacillin
Hetacillin*
*Penicillins approved for veterinary use
Please be aware that penicillin trade names may vary by region and country. Manufacturers, including repackers, are responsible for knowing whether their drug is penicillin. US FDA’s “Approved Drug Products with Therapeutic Equivalence Evaluations” (Orange Book) or Drugs at FDA, both of which are located at US FDA’s website, enable searching by trade name (i.e., proprietary name) and by active ingredient name (i.e., generic or non-proprietary name).
3. Why cross-contamination is a serious concern with penicillin drugs?
Penicillin can become a sensitizing agent in a contaminated product which triggers a hypersensitive exaggerated allergic immune response in some people. Differences in the chemically substituted 6-aminopenicillanic acid side chain can generate allergic reactions ranging from skin rashes to life-threatening anaphylaxis.
4. Are there special manufacturing requirements for Penicillin drugs?
Yes, all penicillin finished pharmaceutical manufacturers, including repackers, are required by the CGMP regulations to establish a comprehensive control strategy designed to prevent cross-contamination of other drugs with penicillin. These requirements include:
21 CFR 211.42(d): Separation of facility and equipment
21 CFR 211.46(d): Separate air handling systems (HVAC)
21 CFR 211.176: Test for traces of penicillin where possible exposure exits.
Penicillin Active Pharmaceutical Ingredients (APIs) are also required to be manufactured under CGMPs in accordance with Section 501(a)(2)(B) of the Federal Food, Drug, and Cosmetic Act. US FDA has published internationally harmonized guidance on the manufacture of APIs; see
International Conference on Harmonization (ICH) Q7A Good Manufacturing Practice Guidance for Active Pharmaceutical Ingredients. Chapter 4, section 4.4 of this guidance describes actions API manufacturers,
including those who manufacture or package APIs or penicillin intermediates, are to follow to ensure such material is contained and does not contaminate other drugs.
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