Can't Find Voriconazole? Here Are Your Options

If your pharmacy can't fill your Voriconazole prescription, you're probably feeling anxious — and for good reason. Voriconazole treats serious, sometimes life-threatening fungal infections. Going without treatment isn't an option.

The good news is that there are several effective alternative antifungal medications your doctor can consider. This article explains what Voriconazole does, how it works, and which alternatives might be right for you.

Important: Never switch medications on your own. Only your doctor can determine which antifungal is safe and effective for your specific infection. This article is for informational purposes only.

What Is Voriconazole and How Does It Work?

Voriconazole (brand name Vfend) is a triazole antifungal medication. It's one of the most commonly prescribed drugs for invasive aspergillosis — a serious lung infection caused by Aspergillus mold — and is also used for other severe fungal infections including candidemia and infections caused by Scedosporium and Fusarium species.

Voriconazole works by blocking an enzyme called 14-alpha-sterol demethylase, which fungi need to produce ergosterol. Ergosterol is a critical component of fungal cell membranes (similar to how cholesterol works in human cells). Without ergosterol, the fungal cell membrane becomes unstable, and the fungus dies.

For a deeper dive, read How Does Voriconazole Work? Mechanism of Action Explained.

Voriconazole comes in three forms: oral tablets (50 mg and 200 mg), oral suspension (40 mg/mL), and IV injection (200 mg vials). It's taken twice daily, usually for weeks to months depending on the infection.

Why Might You Need an Alternative?

There are several reasons you might need a different antifungal:

• Pharmacy shortage — Voriconazole has been intermittently difficult to find, especially the IV formulation. See our shortage update for details.
• Side effects — Some patients can't tolerate Voriconazole's visual disturbances, liver toxicity, or skin sensitivity. Learn more about Voriconazole side effects.
• Drug interactions — Voriconazole interacts with many medications, which may make it unsafe for some patients. Check our guide on Voriconazole drug interactions.
• Cost — Even generic Voriconazole can cost $300–$900 per month without insurance.
• Resistant infection — Some fungal strains don't respond to Voriconazole.

Alternative #1: Isavuconazole (Cresemba)

Isavuconazole (sold as Isavuconazonium sulfate under the brand name Cresemba) is the most direct alternative to Voriconazole. It's a newer triazole antifungal that was FDA-approved in 2015.

What it treats: Invasive aspergillosis and invasive mucormycosis — making it actually broader in coverage than Voriconazole for certain infections.

Key advantages:

• Fewer drug interactions than Voriconazole
• No visual disturbances (a major Voriconazole side effect)
• No QT prolongation — it actually shortens the QT interval
• Can be taken with or without food
• Available as oral capsules and IV formulation
• No dose adjustment needed for kidney impairment (IV formulation uses a different vehicle than Vfend)

Drawbacks: Cresemba is expensive — often $1,500+ per month even with insurance. It may require prior authorization.

Alternative #2: Posaconazole (Noxafil)

Posaconazole (brand name Noxafil) is another triazole antifungal with broad-spectrum activity.

What it treats: FDA-approved for prophylaxis (prevention) of invasive Aspergillus and Candida infections in high-risk patients, and for oropharyngeal candidiasis. Widely used off-label for treatment of various invasive fungal infections.

Key advantages:

• Broader antifungal spectrum than Voriconazole
• Effective against mucormycosis (Voriconazole is not)
• Available as delayed-release tablets, oral suspension, and IV
• Well-established safety profile

Drawbacks: The oral suspension has variable absorption. Delayed-release tablets are preferred but expensive. May still cause liver enzyme elevations and QT prolongation.

Alternative #3: Itraconazole (Sporanox)

Itraconazole (brand name Sporanox) is an older triazole antifungal that's been available since the 1990s.

What it treats: Aspergillosis, blastomycosis, histoplasmosis, and various other fungal infections. Sometimes used as step-down therapy after initial treatment with another antifungal.

Key advantages:

• Long track record of use
• Available as a generic — significantly cheaper than Cresemba or Noxafil
• Oral capsules and oral solution available

Drawbacks: Less effective than Voriconazole for invasive aspergillosis. Has significant drug interactions. Capsules require an acidic stomach for absorption (take with food or cola). Can cause heart failure in some patients. Requires therapeutic drug monitoring.

Alternative #4: Amphotericin B (AmBisome)

Amphotericin B — particularly the liposomal formulation AmBisome — is an IV-only antifungal that's often considered the "big gun" of antifungal therapy.

What it treats: Nearly all invasive fungal infections, including aspergillosis, candidiasis, cryptococcosis, and mucormycosis.

Key advantages:

• Broadest spectrum of any antifungal
• Works against fungi resistant to azoles
• Decades of clinical evidence

Drawbacks: IV-only — requires hospitalization or infusion center visits. Can cause significant kidney damage (nephrotoxicity), even with the liposomal formulation. Infusion-related reactions (fever, chills, rigors) are common. Not a practical long-term outpatient option.

How to Decide: Talk to Your Doctor

The right alternative depends on several factors:

• What type of fungal infection you have
• How severe your infection is
• What other medications you take
• Your kidney and liver function
• Whether you need oral or IV treatment
• Your insurance coverage and cost considerations

Your infectious disease doctor or prescriber is the best person to make this call. Bring a list of your current medications and any side effects you've experienced with Voriconazole.

Still Looking for Voriconazole?

Before switching medications, it's worth making sure Voriconazole truly isn't available anywhere near you. Use Medfinder to check real-time pharmacy stock in your area. You might find it at an independent or specialty pharmacy that your regular pharmacy doesn't know about.

For more tips, read How to Find Voriconazole in Stock Near You.

Final Thoughts

Not being able to find your antifungal medication is scary, but you have options. Isavuconazole, Posaconazole, Itraconazole, and Amphotericin B are all legitimate alternatives that your doctor can consider. The key is to act quickly — don't let a gap in your antifungal treatment go unaddressed.

Talk to your doctor, check Medfinder, and don't stop treatment on your own. You've got this.