Toenail Fungus Medication: What You Need to Know

Antifungal medication is one of the most common treatments for toenail fungus. But not all medications work the same way, and some carry risks that are worth understanding before you start a course.

This guide covers the main topical and oral antifungal medications available in Australia, how they work, how long treatment takes, and when a podiatrist might suggest a different approach.

If you’re not sure whether your nail problem is fungal, try our AI Nail Scanner for a quick self-check. And if you want to understand what causes toenail fungus, we cover that in a separate post.

Topical Antifungal Medications

Topical treatments are applied to the nail surface. They come as lacquers, solutions, or creams. In Australia, common options include:

Amorolfine (Loceryl)

Loceryl is a nail lacquer applied once or twice a week. It works by disrupting the fungal cell membrane. You file the nail surface before each application to help the product penetrate.

• Treatment duration: 6–12 months for toenails
• Availability: Over the counter at pharmacies
• Effectiveness: Best for mild infections that affect less than 50% of the nail

Ciclopirox (Rejuvenail)

Rejuvenail is another medicated nail lacquer. It works by blocking the enzymes fungi need to survive. Applied daily, with weekly removal of built-up layers.

• Treatment duration: Up to 12 months
• Availability: Over the counter
• Effectiveness: Similar to amorolfine — suits mild to moderate infections

Limitations of Topical Treatments

Topical medications struggle to reach the fungus growing beneath the nail plate. For infections that have spread across the nail or into the nail bed, topical treatments alone have a cure rate of around 10–15%. They work best as a supporting treatment alongside oral medication or laser therapy, or for early-stage infections caught before they spread.

Oral Antifungal Medications

Oral antifungals are the standard medical treatment for moderate to severe toenail fungus. They travel through the bloodstream and reach the nail bed from the inside, which makes them more effective than topical options for established infections.

In Australia, you need a prescription from a GP or specialist to access oral antifungals for toenail fungus.

Terbinafine (Lamisil)

Terbinafine is the most prescribed oral antifungal for toenail fungus worldwide. It kills dermatophyte fungi — the type responsible for most nail infections.

• Dose: 250 mg once daily
• Treatment duration: 12 weeks (3 months) for toenails, 6 weeks for fingernails
• Cure rate: Around 70–80% when used as directed
• How it works: Blocks an enzyme called squalene epoxidase, which fungi need to build their cell membranes. Without it, the fungal cells die.

Side effects to know about:

• Stomach upset, nausea, or diarrhoea (common but mild)
• Taste disturbance — some people notice a metallic taste or reduced sense of taste
• Headache
• Liver toxicity (rare but serious) — your GP will order liver function blood tests before starting treatment and may repeat them during the course
• Skin rash (stop the medication and contact your doctor if this occurs)

Who should avoid terbinafine:

• People with liver disease or a history of liver problems
• Those with kidney impairment (dose adjustment may be needed)
• People taking certain medications — terbinafine interacts with some antidepressants, beta-blockers, and other drugs. Your GP will review your medication list.

Itraconazole (Sporanox)

Itraconazole is a broad-spectrum antifungal. It treats dermatophytes and also works against yeast and mould infections, which terbinafine does not cover as well.

• Dose: Pulse therapy — 200 mg twice daily for one week, then three weeks off. Repeat for 3 pulses (3 months total).
• Alternative dosing: 200 mg daily for 12 weeks (continuous)
• Cure rate: Around 60–70%
• How it works: Blocks the production of ergosterol, a key component of fungal cell membranes.

Side effects to know about:

• Nausea, bloating, or stomach pain
• Headache
• Liver toxicity — blood tests required before and during treatment
• Heart effects — itraconazole can worsen heart failure. Not suitable for people with heart conditions.
• Drug interactions — itraconazole interacts with a long list of medications, including statins, blood thinners, and some blood pressure drugs. Always tell your GP about every medication you take.

Who should avoid itraconazole:

• People with heart failure or ventricular dysfunction
• Those with liver disease
• Pregnant or breastfeeding women
• Anyone taking medications that interact with azole antifungals

Fluconazole (Diflucan)

Fluconazole is less common for toenail fungus in Australia. It is sometimes used when terbinafine and itraconazole are not suitable.

• Dose: 150–300 mg once weekly
• Treatment duration: 6–12 months for toenails
• Cure rate: Lower than terbinafine — around 50–60%
• Best for: Yeast-related nail infections (Candida species)

Blood Tests and Monitoring

Both terbinafine and itraconazole can affect the liver. Before you begin a course of oral antifungals, your GP will run a liver function test. If you are on a longer course, or you have other health conditions, follow-up blood tests may be repeated at 6 weeks.

This is a standard precaution. Serious liver problems from these medications are rare, but the blood test catches any issues early.

Do You Need a Prescription in Australia?

In Australia:

• Topical antifungals (Loceryl, Rejuvenail) are available over the counter at pharmacies. No prescription needed.
• Oral antifungals (terbinafine, itraconazole, fluconazole) require a prescription from a GP or specialist. Terbinafine for toenail fungus is listed on the PBS, which reduces the cost with a valid prescription.

A podiatrist cannot prescribe oral medication but can diagnose your infection, recommend whether medication is appropriate, and refer you to your GP with a treatment plan.

When Medication Alone Is Not Enough

Oral antifungals work well for many people, but they are not the answer in every case. Medication may not be the best option if:

• You have liver disease or take medications that interact with antifungals
• You have had a previous course of oral antifungals that did not clear the infection
• The infection is severe or affects multiple nails
• You prefer to avoid systemic medication

In these situations, other approaches — including laser treatment — may be more effective. Some patients get the best results from combining medication with another treatment. A podiatrist can assess your nails and help you decide what makes sense for your situation.

For an overview of all available options, visit our fungal nail treatment page.

How a Podiatrist Fits In

At ModPod Podiatry, we diagnose fungal nails through visual assessment under magnification. An experienced podiatrist can identify fungal nail infections on the spot — no waiting weeks for results. Treatment planning starts the same day.

If medication is the right path, we provide a clear recommendation to take to your GP. If your infection would respond better to a different approach, we explain why and walk you through the alternatives.

We have treated over 10,000 patients with fungal nail infections across our five Sydney clinics (CBD, Mosman, Dee Why, Rose Bay, and North Ryde).

Frequently Asked Questions

How long do you take terbinafine for toenail fungus?

The standard course is 12 weeks (3 months) of daily tablets for toenails. Fingernails require only 6 weeks. Your GP may adjust the duration based on how the nail responds. After you finish the course, the nail takes another 6–12 months to grow out and look clear.

Can I drink alcohol while taking antifungal medication?

There is no absolute ban on alcohol with terbinafine or itraconazole. However, both medications are processed by the liver. Drinking adds extra load on the liver during treatment. Most GPs recommend limiting alcohol or avoiding it during the course — especially if your liver function tests are borderline.

What are the side effects of Lamisil (terbinafine)?

The most common side effects are stomach upset, diarrhoea, taste changes, and headache. Serious side effects like liver damage or severe skin reactions are rare but possible. If you develop yellowing of the skin, dark urine, or a rash, stop the medication and see your GP straight away.

Do I need a prescription for fungal nail medication in Australia?

Topical treatments like Loceryl and Rejuvenail are available without a prescription. Oral antifungals (terbinafine, itraconazole, fluconazole) all require a prescription from a GP. A podiatrist can diagnose the infection and recommend the right medication for your GP to prescribe.

Are home remedies like tea tree oil or Vicks effective?

Home remedies have limited evidence behind them. Some may slow fungal growth in mild cases, but they are not a reliable cure for established infections.

Next Steps

If you think you have a fungal nail infection, start with our free AI Nail Scanner for an initial indication.

Want to know which treatment is right for you? See our fungal nail treatment options or call (02) 9960 3981.