Compound Chloramphenicol is bactericidal and covers Salmonella typhi, ampicillin-resistant Haemophilus influenzae type B meningitis, Streptococcus pneumoniae, Neisseria meningitidis meningitis, and sensitive gram-negative bacilli, as well as aerobic and anaerobic organisms, and also rickettsial infections. Compound chloramphenicol is not recommended for use in pregnant women, lactating women and newborns, because chloramphenicol can cross the placental barrier, and may cause toxic reactions to preterm and term newborns, the occurrence of “gray baby syndrome”, should be used with caution in elderly patients, and is contraindicated in people who are allergic to chloramphenicol. Chloramphenicol toxic side effects, especially on the hematopoietic system, may cause bone marrow suppression, hemolytic anemia, long-term use may induce bleeding tendency, but also peripheral neuritis and optic nerve, diarrhea, nausea, vomiting and other adverse reactions. The use of chloramphenicol should test the blood routine, liver and kidney function, for liver and kidney damage should be avoided, chloramphenicol adverse reactions are many and serious, so the clinical use of less, it is recommended that patients, if necessary, consult a physician or pharmacist before use, do not blindly use on their own, so as not to affect the health.