Micafungin Viatris (Micafungin)

Micafungin is an echinocandin antifungal used to manage serious Candida infections and to prevent fungal disease in high‑risk patients.

• Invasive candidiasis: provides systemic eradication of bloodstream and deep‑tissue Candida infections.
• Candida esophagitis: clears esophageal Candida infection and relieves associated dysphagia.
• Candida peritonitis: eliminates peritoneal Candida infection following abdominal surgery.
• Hematopoietic stem cell transplant prophylaxis: prevents invasive fungal disease during periods of neutropenia.

• Micafungin inhibits the enzyme β‑(1,3)‑D‑glucan synthase, blocking synthesis of β‑(1,3)‑D‑glucan, an essential structural component of the fungal cell wall. This disruption weakens the cell wall, leading to osmotic instability and fungal cell death, while human cells lacking this pathway remain unaffected.

Micafungin may cause a range of adverse reactions, from mild infusion‑related symptoms to rare but serious events.

Common Side Effects

• Fever or chills during infusion
• Nausea or vomiting
• Headache
• Elevated liver enzymes (ALT, AST)
• Rash or pruritus
• Mild hypotension

Serious or Rare Side Effects

• Severe hepatic failure or jaundice
• Anaphylactic or severe hypersensitivity reactions
• Stevens‑Johnson syndrome or toxic epidermal necrolysis
• Acute renal impairment
• Severe hypotension requiring intervention
• Life‑threatening infusion reactions

When using Micafungin, clinicians should consider several safety measures.

• Hepatic monitoring: assess liver function tests before and during therapy.
• Renal monitoring: evaluate renal function, especially in patients with pre‑existing impairment.
• Concomitant hepatotoxic drugs: avoid or monitor closely when used with other liver‑affecting agents.
• Known hypersensitivity: do not administer to patients with documented allergy to Micafungin or other echinocandins.
• Pregnancy and lactation: use only if the potential benefit justifies the potential risk, as safety data are limited.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Micafungin can interact with other medicines, affecting its efficacy or safety.

Major Interactions (Avoid)

• Cyclosporine: Micafungin may increase cyclosporine exposure, raising toxicity risk.
• Rifampin or other strong enzyme inducers: may reduce Micafungin plasma concentrations, compromising effectiveness.
• Concomitant use with other echinocandins: increases risk of additive toxicity.

Moderate Interactions (Monitor Closely)

• Azole antifungals (e.g., fluconazole, voriconazole): may alter Micafungin levels; monitor clinical response.
• Immunosuppressants (e.g., tacrolimus, sirolimus): potential for altered drug concentrations; adjust dosing as needed.
• Warfarin: possible effect on INR; monitor coagulation parameters.