Vcand (Voriconazole): A Triazole Antifungal

Vcand contains Voriconazole, a triazole antifungal medicine. It is indicated for the treatment of serious fungal infections in patients 12 years of age and older. Voriconazole works by inhibiting the synthesis of ergosterol, a crucial component of fungal cell membranes. It is effective against a variety of infections, including invasive aspergillosis, candidemia, and infections caused by Scedosporium and Fusarium species.

How Vcand Works (Pharmacology)

Voriconazole inhibits fungal growth by disrupting their cell membrane synthesis:

• Ergosterol Synthesis Inhibition: It binds to and inhibits the enzyme CYP450-dependent 14-alpha sterol demethylase.
• Depletes Ergosterol: This inhibition leads to a depletion of ergosterol, which is a vital component of the fungal cell membrane.
• Damages Cell Membrane: The loss of ergosterol results in structural and functional damage to the fungal cell membrane, ultimately leading to the death of the fungal cell.

Key Indications & Benefits

Vcand is indicated for the treatment of:

• Invasive aspergillosis.
• Candidemia in non-neutropenic patients and disseminated candidiasis.
• Esophageal candidiasis.
• Serious infections caused by Scedosporium apiospermum and Fusarium species.
• Patients who are intolerant of, or refractory to, other therapies.

Dosage & Administration

The dosage of Vcand varies by weight and whether it is an oral or intravenous formulation. Oral doses should be taken at least one hour before or one hour after a meal. Always consult a registered physician for specific dosage instructions.

• Oral (Adults ≥40 kg):
  • Loading dose: 400 mg every 12 hours for the first 24 hours.
  • Maintenance dose: 200 mg twice daily.
• Oral (Adults <40 kg):
  • Loading dose: 200 mg every 12 hours for the first 24 hours.
  • Maintenance dose: 100 mg twice daily.
• Injection: Loading and maintenance doses are weight-based (mg/kg) and administered intravenously every 12 hours.

Important Considerations & Warnings

It is crucial to discuss your full medical history with your doctor before taking Vcand.

Contraindications:

• Known hypersensitivity to Voriconazole or any components of the drug.
• Co-administration with:
  • Terfenadine, astemizole, cisapride, pimozide, or quinidine.
  • Sirolimus.
  • Rifampin, carbamazepine, long-acting barbiturates, efavirenz, ritonavir, rifabutin, ergot alkaloids, and St. John's Wort.

Side Effects:

• Common: Abdominal pain, anemia, blurred vision, headache, chest pain, nausea, and diarrhea.
• Other: The document does not list any other side effects.

Pregnancy & Lactation:

• Pregnancy: There are no adequate and well-controlled studies in pregnant women. It should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Precautions & Warnings:

• Long-term use (over 180 days): Requires careful assessment of the benefit-risk balance, as long-term use has been associated with squamous cell carcinoma of the skin (SCC).
• Children: The efficacy and safety in children under 12 years of age have not been established.

Drug Interactions:

• CYP450 enzymes: Vcand is a substrate, inhibitor, and inducer of various CYP450 enzymes. The dosage of both Vcand and other co-administered drugs may need to be adjusted, and patients should be monitored for adverse reactions or lack of efficacy.
• Phenytoin or Efavirenz: Co-administration requires an increased maintenance dose of Vcand.

Overdose Effects

• No data is available regarding overdose of Vcand.

Storage Conditions

• Store tablets and reconstituted suspension in a dry place, below 25°C, protected from light.
• Store the powder for suspension between 2°C and 8°C.
• Discard the reconstituted suspension after 14 days.
• Keep out of the reach of children.