Chloramphenicol

chloramphenicol
IUPAC name: see chemistry section Synonyms: see below Formula: C11H12Cl2N2O5
Uses:	antibiotic
Properties:
Hazards:	toxicity
Mass (g/mol): CAS #: 323.1294 56-75-7

Chloramphenicol was the first broad-spectrum antibiotic discovered, in 1947, from Streptomyces venequelae cultures. Although it is active against a wide variety of organisms including tetracycline-resistant vibrios, toxicity and safety concerns, such as bone marrow damage and anemia, typically limits its systemic use to only the treatment of very serious infections, such as cholera and typhoid fever. The antibiotic works by binding to bacterial ribosome 50S subunits and inhibiting bacterial protein synthesis.

"Therapy with chloramphenicol must be limited to infections for which the benefits of the drug outweigh the risks of the potential toxicities. When other antimicrobial drugs are available that are equally effective and potentially less toxic than chloramphenicol, they should be used."

Chemistry

Chloroamphenicol, or 2,2-dichloro-N-[1,3-dihydroxy-1-(4-nitrophenyl)propan-2-yl]acetamide, has molecular formula C₁₁H₁₂Cl₂N₂O₅ and molecular mass 323.1294 g/mol. The drug is referred to by several names, including CAF, CAM, CAP, chloramphenicole, chloramfenikol, chloroamphenicol, cloroamfenicolo, CPh, D-Chloramphenicol.

Indications

Uses approved by the U.S. Food and Drug Administration are: Bacteroides brain sbscess, boutonneuse Fever, Hemophilus influenzae meningitis, Neisseria meningitidis meningococcal meningitis, Paratyphoid Fever, rickettsial infection, streptococcal meningitis, typhoid fever; unlabeled but recognized uses include Clostridium perfringens gas gangrene, glanders, plague, ehrlichiosis, non-cutaneous anthrax and tularemia. In combination with doxycycline and co-trimoxazole, it is used for melioidosis.

Preparations

For systemic disease, the drug may be given orally or intravenously, although oral preparations are no longer available in the US. An opthalmic ointment is used for bacterial conjunctivitis, and is over-the-counter in the UK but on prescription in the US.

References

The most up-to-date information about Chloramphenicol and other drugs can be found at the following sites.

• Chloramphenicol - FDA approved drug information (drug label) from DailyMed (U.S. National Library of Medicine).
• Chloramphenicol - Drug information for consumers from MedlinePlus (U.S. National Library of Medicine).
• Chloramphenicol - Detailed information from DrugBank.