Drug Index

Chloramphenicol

 
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Mechanism :

Chloramphenicol exerts mainly a bacteriostatic effect on a wide range of gram-negative and gram-positive bacteria and is active against rickettsia, the lymphogranuloma-psittacosis group, Salmonella typhi, Vibrio cholerae and Hemophilus influenzae. The mode of action is through interference or inhibition of protein synthesis in intact cells.


Indication :

• Typhoid

• Meningitis

• Conjunctivitis

• Septicemia

• External otitis

• Rickettsia fevers


Contraindications :

Chloramphenicol is contraindicated in individuals with a history of previous hypersensitivity and/or toxic reaction to it. It must not be used in the treatment of trivial infections or where it is not indicated, as in colds, influenza, infections of the throat.


Dosing :

Neonates: Initial loading dose of 20 mg/kg IV once, followed by maintenance doses 12 hourly.

Infants and children: (adult doses)

In case adequate CSF concentration required, 100 mg/kg/day; to be reduced to 50 mg/kg/day as soon as possible. In suspected immature metabolic functions: 25 mg/kg/day in in 6 hourly divided doses.


Adverse Effect :

Serious and fatal blood dyscrasias, like aplastic anemia, hypoplastic anemia, thrombocytopenia and granulocytopenia, nausea, vomiting, glossitis and stomatitis, diarrhea, enterocolitis, headache, mild depression, mental confusion, delirium, optic and peripheral neuritis, fever, macular and vesicular rashes, angioedema, urticaria, anaphylaxis, Grey baby syndrome.


Interaction :

Warfarin, Phenytoin and Sulphonylureas: Increased plasma levels of these drugs.
Phenobarbital and Rifampicin: Decrease chloramphenicol levels.
Chloramphenicol: Antagonistic to beta-lactam antibiotics, including ceftazidime.


07/17/2019 11:00:23 Chloramphenicol
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