What does chloramphenicol mean?
Chloramphenicol is a potent broad-spectrum antibiotic effective against a wide range of bacteria, including the organisms responsible for typhoid fever, bacterial meningitis, and rickettsial diseases. Originally isolated in the late 1940s from cultures of the soil bacterium Streptomyces venezuelae, it was the first antibiotic produced industrially on a large scale by total synthesis rather than fermentation. Its clinical value, however, is tempered by a serious drawback: rare but potentially irreversible damage to the bone marrow, which can lead to aplastic anemia. For this reason, systemic use is generally confined to severe infections that have failed to respond to safer alternatives, although low-dose topical formulations such as eye drops remain widely prescribed for bacterial conjunctivitis in many countries. The word appears almost exclusively in medical, pharmacological, and regulatory contexts, including veterinary and food-safety rules governing drug residues.
nounA broad-spectrum antibiotic, produced originally from the soil bacterium Streptomyces venezuelae and now typically manufactured synthetically, used to treat serious infections such as typhoid fever and bacterial meningitis.
- The broad-spectrum antibiotic compound itself, used systemically to treat serious bacterial infections such as typhoid fever and meningitis.
- Topical preparations of the drug (eye drops or ointment) used to treat conjunctivitis and other localized infections.
"Because of its risk of severe side effects, chloramphenicol is reserved for infections that do not respond to safer antibiotics."
"The physician prescribed intravenous chloramphenicol after confirming a diagnosis of typhoid fever."
"A short course of chloramphenicol eye drops usually clears up stubborn bacterial conjunctivitis."
Discovered in soil bacteria in the late 1940s, this life-saving antibiotic can rarely cause fatal bone-marrow failure — so doctors reach for it only when nothing else will work.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of chloramphenicol
Coined in the mid-twentieth century when the drug was first characterized, the name combines the prefix 'chlor-' (from Greek 'chlōros', pale green), referring to the chlorine atom in its structure, with elements reflecting its chemical composition as a nitrobenzene derivative bearing an amide group. It belongs to the same family of scientific coinages built on 'chlor-' as words like chlorophyll and chlorine, though it has no true cognates outside technical chemistry vocabulary.
How chloramphenicol is actually used
Strictly a medical/scientific term, encountered almost exclusively in clinical, pharmacological, or veterinary contexts; it carries no informal register. In human medicine it is now largely a drug of last resort because of the rare but potentially fatal risk of aplastic anemia, though topical use for eye infections remains routine in many countries. It also appears in discussions of food safety, as chloramphenicol residues are banned in livestock destined for human consumption in many jurisdictions.
Easily confused with chloramphenicol
Chloroquine is an antimalarial drug, whereas chloramphenicol is a broad-spectrum antibiotic; the two share the 'chlor-' prefix but treat entirely different diseases.
Chlorpromazine is an antipsychotic medication, while chloramphenicol is an antibiotic used against bacterial infections.