Mycosyst (Fluconazole)

Fluconazole is used to treat fungal infections by targeting the Candida species and other pathogenic fungi.

• Candidiasis (oropharyngeal, esophageal, vaginal): clears yeast overgrowth and relieves associated symptoms.
• Cryptococcal meningitis: penetrates the central nervous system to eradicate Cryptococcus neoformans.
• Dermatophyte infections: eliminates skin‑surface fungi causing ringworm and related conditions.
• Systemic fungal infections: provides broad‑spectrum activity against invasive fungal pathogens.

• Fluconazole inhibits the fungal cytochrome P450 enzyme 14α‑demethylase, a key step in ergosterol synthesis. By blocking ergosterol production, the drug disrupts fungal cell membrane formation, leading to increased membrane permeability and ultimately fungal cell death. This mechanism provides selective activity against susceptible fungi while sparing human cells.

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

Common Side Effects

• Nausea: mild to moderate stomach upset.
• Headache: transient cranial discomfort.
• Diarrhea: loose stools occurring during therapy.
• Abdominal pain: cramping or discomfort in the stomach area.
• Rash: mild skin irritation or redness.

Serious or Rare Side Effects

• Hepatotoxicity: elevated liver enzymes or liver injury.
• Severe skin reactions: Stevens‑Johnson syndrome or toxic epidermal necrolysis.
• QT interval prolongation: potential cardiac rhythm disturbances.
• Anaphylaxis: rare but life‑threatening allergic response.
• Liver failure: acute hepatic dysfunction requiring medical attention.

Before initiating fluconazole therapy, consider the following precautions.

• Assess liver function: evaluate baseline hepatic enzymes and monitor during treatment.
• Review cardiac history: caution in patients with known QT prolongation or electrolyte imbalances.
• Evaluate renal function: dosage adjustment may be needed in severe renal impairment.
• Pregnancy and lactation: use only if the potential benefit justifies the potential risk, as safety data are limited.
• Drug interactions: check for concomitant medications that may affect fluconazole metabolism.
• Store at ambient temperature: keep below 25 °C, retain in original packaging, and protect from moisture.

Fluconazole interacts with several medicines; careful management is required.

Major Interactions (Avoid)

• Warfarin: increased anticoagulant effect, risk of bleeding.
• Simvastatin or lovastatin: elevated statin levels, risk of myopathy.
• Cisapride: risk of serious cardiac arrhythmias.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: reduced efficacy, consider backup contraception.
• Phenytoin or carbamazepine: decreased fluconazole levels, may reduce effectiveness.
• Rifampin: induces metabolism, lowering fluconazole concentrations.
• Ergot alkaloids: increased risk of ergotism, monitor for vasospasm.
• Digoxin: possible increase in serum levels, monitor cardiac function.