Clotrimazole — NZ Medication Guide

What is Clotrimazole?

Clotrimazole (generic name: clotrimazole) is a medication used primarily for fungal skin infections, vaginal thrush, and oral thrush. Clotrimazole cream, pessaries, and solutions are available over-the-counter at New Zealand pharmacies under the Canesten brand. No prescription is required for most formulations.

What is Clotrimazole Used For?

Clotrimazole is prescribed by healthcare professionals in New Zealand for the following indications:

• Vaginal candidiasis (thrush)
• Tinea pedis (athlete’s foot)
• Tinea corporis (ringworm)
• Tinea cruris (jock itch)
• Cutaneous candidiasis (skin fold infections)
• Oral candidiasis (thrush) — lozenge form
• Pityriasis versicolor

How Does Clotrimazole Work?

Clotrimazole is an imidazole antifungal that inhibits ergosterol synthesis by blocking the fungal cytochrome P450 enzyme lanosterol 14-alpha-demethylase. Depletion of ergosterol disrupts fungal cell membrane integrity, leading to cell death. Clotrimazole is active against Candida species and dermatophytes.

How to Take Clotrimazole

For vaginal thrush: use vaginal cream or pessary (500mg single-dose or 100mg for 6 nights) at bedtime. For skin infections: apply cream to affected area twice daily and continue for at least 4 weeks for tinea pedis. Treatment should continue 1–2 weeks after symptoms resolve to prevent recurrence. Canesten HC combination (clotrimazole plus hydrocortisone) is available for infected eczema.

Common Side Effects

• Local burning, itching, or stinging at application site
• Mild skin redness or irritation
• Vaginal burning or discharge (with vaginal preparations)
• Mild abdominal cramps (vaginal use)
• Mild nausea (with lozenges)

Serious Side Effects — Seek Medical Attention

• Allergic contact dermatitis — widespread rash, severe irritation
• Anaphylaxis (very rare)
• Worsening symptoms may indicate misdiagnosis or resistance — seek review

Drug Interactions

• Warfarin — topical use is unlikely to significantly interact; monitor with vaginal formulations
• Latex contraceptives — clotrimazole cream can damage condoms and diaphragms; avoid for 72 hours after vaginal use
• Tacrolimus — may increase levels with extensive skin application

New Zealand Prescribing Information

In New Zealand, Canesten products are available OTC for vaginal thrush and skin fungal infections. BPAC NZ supports a single-dose 500mg pessary for uncomplicated vaginal thrush. Women with recurrent thrush (4+ episodes per year) should see their GP for investigation. Canesten HC (with hydrocortisone) is available for infected eczema but should not be used on the face or for more than 7 days without medical advice.

Frequently Asked Questions

Can I treat vaginal thrush with clotrimazole without a prescription?

Yes — Canesten vaginal cream and pessaries are available OTC from NZ pharmacies. A single-dose 500mg pessary is the most convenient option. If you are pregnant, consult your pharmacist or doctor first. If symptoms do not improve after treatment, see your GP.

How long do I use clotrimazole for athlete’s foot?

Apply twice daily for 4 weeks, even if symptoms improve sooner. Stopping too early is the most common cause of recurrence. Keep feet clean and dry, change socks daily, and avoid sharing towels or footwear.

References & Further Information

The following New Zealand and international resources were used to inform this page:

• New Zealand Formulary — Clotrimazole
• Pharmac — Funded Medicines Schedule
• BPAC NZ — Vaginal Candidiasis
• Medsafe — Canesten Consumer Information

Reviewed by a Registered Pharmacist — KiwiMeds New Zealand