Moxifloxacin Brown & Burk Uk (Moxifloxacin)

Moxifloxacin is indicated for bacterial infections affecting the respiratory and skin systems, as well as intra‑abdominal infections.

• Community‑acquired pneumonia: effective bacterial eradication leading to clinical recovery.
• Acute bacterial sinusitis: reduces sinus inflammation and clears the infecting organisms.
• Acute bacterial exacerbation of chronic bronchitis: improves symptoms and prevents further deterioration.
• Skin and skin‑structure infections: resolves infection and promotes healing of affected tissues.
• Complicated intra‑abdominal infections: assists in controlling polymicrobial infection and supports recovery.

• Moxifloxacin exerts its antibacterial activity by binding to bacterial DNA gyrase (topoisomerase II) and topoisomerase IV, enzymes essential for DNA supercoiling and replication. Inhibition of these enzymes prevents DNA synthesis and transcription, leading to bacterial cell death. The drug displays concentration‑dependent killing and a broad spectrum against Gram‑positive, Gram‑negative and atypical pathogens.

Moxifloxacin may cause a range of adverse reactions, varying from mild to severe.

Common Side Effects

• Nausea: mild gastrointestinal upset.
• Diarrhea: loose stools, often self‑limiting.
• Headache: transient cranial discomfort.
• Dizziness: occasional vertigo or light‑headedness.

Serious or Rare Side Effects

• Tendon rupture: sudden tendon pain or swelling, especially in the Achilles.
• QT prolongation: cardiac rhythm disturbances detectable on ECG.
• Severe hypersensitivity: anaphylaxis, angioedema, or Stevens‑Johnson syndrome.
• Clostridioides difficile infection: severe colitis with watery diarrhea.

When prescribing moxifloxacin, clinicians should consider several precautionary measures to minimise risks.

• Assess renal and hepatic function: adjust therapy if significant impairment is present.
• Review patient history for tendon disorders: avoid use in those with recent tendon injury or corticosteroid therapy.
• Evaluate cardiac risk: avoid in patients with known QT prolongation or electrolyte disturbances.
• Monitor for hypersensitivity: discontinue at first sign of rash or allergic reaction.
• Avoid use in pregnancy and lactation unless benefits outweigh risks: limited safety data are available.
• Store at ambient temperature: keep below 25 °C, in the original container, protected from moisture and light.

Moxifloxacin interacts with several medicines; awareness of these interactions helps prevent adverse outcomes.

Major Interactions (Avoid)

• Antacids containing aluminium or magnesium: reduce absorption of moxifloxacin.
• Warfarin: may increase INR and bleeding risk.
• Cyclosporine: increased cyclosporine levels leading to toxicity.

Moderate Interactions (Monitor Closely)

• Non‑steroidal anti‑inflammatory drugs (NSAIDs): may increase risk of CNS stimulation.
• Theophylline: potential for elevated plasma concentrations.
• Diabetic agents (e.g., insulin, sulfonylureas): may cause hypoglycaemia.
• QT‑prolonging drugs (e.g., macrolides, fluoroquinolones): additive effect on cardiac repolarisation.