Medophenicol (Chloramphenicol)

Chloramphenicol is an antibacterial agent used for systemic infections caused by susceptible organisms.

• Typhoid fever: Reduces bacterial load and helps resolve systemic infection.
• Meningitis: Achieves cerebrospinal fluid penetration to eradicate the causative bacteria.
• Rickettsial infections: Controls intracellular organisms responsible for diseases such as typhus.
• Anaerobic infections: Suppresses growth of obligate anaerobes in deep tissue or intra‑abdominal sites.

• Chloramphenicol binds to the 50S ribosomal subunit of susceptible bacteria, blocking the peptidyl transferase activity required for peptide‑bond formation. This inhibition halts protein synthesis, producing a bacteriostatic effect at low concentrations and a bactericidal effect when drug levels are high, thereby limiting bacterial replication.

Adverse reactions may range from mild to life‑threatening and should be monitored during therapy.

Common Side Effects

• Nausea: Mild to moderate gastrointestinal upset.
• Diarrhea: Loose stools that may accompany infection.
• Rash: Skin erythema or pruritus.
• Headache: Transient cephalic discomfort.

Serious or Rare Side Effects

• Aplastic anemia: Irreversible bone‑marrow failure requiring immediate discontinuation.
• Gray syndrome: Metabolic acidosis with cardiovascular collapse, primarily in neonates.
• Leukopenia or thrombocytopenia: Significant reductions in white‑blood cells or platelets.
• Severe hypersensitivity: Anaphylactic reactions with respiratory compromise.
• Hepatotoxicity: Elevated liver enzymes indicating liver injury.

Chloramphenicol requires careful monitoring due to its potential for serious toxicity.

• Renal impairment: Adjust monitoring as the drug is eliminated renally.
• Hepatic dysfunction: Use with caution because metabolism occurs in the liver.
• Blood dyscrasias: Perform regular complete blood‑count assessments.
• Pregnancy: Avoid unless the therapeutic benefit outweighs potential risk (category unknown).
• Drug interactions: Review concomitant medications for additive marrow toxicity.
• Store at ambient temperature below 25°C: keep in the original container, protect from moisture and light.

Chloramphenicol can alter the effects of several co‑administered medicines.

Major Interactions (Avoid)

• Linezolid: Increased risk of additive bone‑marrow suppression.
• Warfarin: Potential enhancement of anticoagulant effect leading to bleeding.
• Aminoglycosides: Heightened risk of nephrotoxicity when combined.

Moderate Interactions (Monitor Closely)

• Phenobarbital: Induces hepatic enzymes, reducing chloramphenicol plasma levels.
• Oral contraceptives: May diminish contraceptive efficacy.
• Alcohol: Can exacerbate hepatic injury risk.