Lekoklar Xl (Clarithromycin)

• Lekoklar Xl (clarithromycin) is indicated for several bacterial infections affecting the respiratory tract, sinuses, skin and gastrointestinal system.
• Community‑acquired pneumonia: eliminates the causative bacteria and improves pulmonary function.
• Acute bacterial sinusitis: reduces sinus inflammation by eradicating the infecting organisms.
• Acute bacterial bronchitis: clears bronchial infection and alleviates cough.
• Skin and soft‑tissue infections: treats Gram‑positive and some atypical pathogens in cutaneous lesions.
• Helicobacter pylori eradication: used as part of combination therapy to achieve bacterial clearance.

• Clarithromycin exerts its antibacterial effect by binding to the 50S subunit of bacterial ribosomes. This interaction blocks the translocation step of protein synthesis, preventing peptide chain elongation and ultimately inhibiting bacterial growth. The drug’s activity is primarily bacteriostatic, though it can be bactericidal at higher concentrations against susceptible organisms.

Clarithromycin may cause a range of adverse reactions, which are categorized by frequency and severity.

Common Side Effects

• Nausea: mild to moderate stomach upset.
• Diarrhea: loose stools, sometimes watery.
• Abdominal pain: cramping or discomfort.
• Altered taste: metallic or bitter sensation.

Serious or Rare Side Effects

• QT interval prolongation: may lead to cardiac arrhythmias.
• Severe allergic reactions: rash, angioedema, anaphylaxis.
• Hepatic dysfunction: elevated liver enzymes or hepatitis.
• Clostridioides difficile‑associated diarrhea: severe colitis.
• Cardiac arrhythmias: ventricular tachycardia or fibrillation.

• When prescribing Lekokar Xl, clinicians should consider several precautionary measures to ensure safe use.
• Assess liver function: evaluate hepatic enzymes before initiating therapy.
• Monitor cardiac status: avoid use in patients with known QT prolongation.
• Evaluate renal function: dose adjustment may be required in severe impairment.
• Review concomitant medications: avoid combinations with major interacting drugs.
• Store at ambient temperature: keep below 25 °C in the original container, protected from moisture.

Clarithromycin interacts with a number of medicines; some combinations should be avoided while others require close monitoring.

Major Interactions (Avoid)

• Statins (simvastatin, lovastatin): risk of rhabdomyolysis.
• Ergot alkaloids (ergotamine, dihydroergotamine): risk of severe vasospasm.
• Pimozide or cisapride: potential for life‑threatening QT prolongation.

Moderate Interactions (Monitor Closely)

• Warfarin: may increase anticoagulant effect.
• Digoxin: can raise serum digoxin concentrations.
• Oral contraceptives: may reduce hormonal efficacy.