Keto-Cure (Ketoconazole)

Ketoconazole is an azole antifungal that targets dermatophyte and yeast infections of the skin.

• Tinea corporis: clears the infection and reduces scaling and redness.
• Tinea cruris: alleviates itching and resolves the fungal rash in the groin area.
• Seborrheic dermatitis: reduces flaking, erythema and fungal colonisation on the scalp and face.
• Other superficial fungal skin infections: treats various cutaneous candidiasis and dermatophytosis presentations.

• Ketoconazole inhibits the fungal enzyme lanosterol 14α‑demethylase, a key component of the ergosterol biosynthesis pathway. By blocking this enzyme, the drug prevents the formation of ergosterol, an essential sterol for fungal cell membrane integrity, leading to increased membrane permeability and ultimately fungal cell death. The disruption of membrane synthesis impairs fungal growth and replication, making ketoconazole effective against a broad spectrum of dermatophytes, yeasts and molds that cause superficial skin infections.

Ketoconazole topical preparations may cause local and, rarely, systemic adverse reactions.

Common Side Effects

• Skin irritation: mild redness, burning or itching at the application site, usually transient.
• Dryness: temporary dryness or peeling of the treated skin area.
• Pruritus: increased itching that may persist during treatment.
• Contact dermatitis: allergic skin reaction presenting as a localized rash and swelling.

Serious or Rare Side Effects

• Hepatotoxicity: rare systemic absorption may cause elevated liver enzymes or hepatitis.
• Severe allergic reaction: anaphylaxis or angioedema requiring immediate emergency care.
• Photosensitivity: heightened sensitivity to sunlight leading to sunburn‑like lesions.
• Secondary infection: overgrowth of bacteria or resistant fungi at the application site.

When using Ketoconazole topical products, certain precautions should be observed to ensure safety and effectiveness.

• Avoid use on broken skin: do not apply to open wounds or extensive abrasions.
• Limit duration: prolonged use beyond recommended period may increase risk of irritation.
• Pediatric use: consult a healthcare professional before treating children under two years.
• Pregnancy and lactation: discuss potential risks with a physician, as safety data are limited.
• Drug interactions: inform the prescriber of concurrent use of other topical or systemic antifungals.
• Store at room temperature: keep in original packaging, protect from moisture and direct sunlight.

Ketoconazole can interact with other medicines; awareness of these interactions helps prevent reduced efficacy or increased toxicity.

Major Interactions (Avoid)

• Systemic azoles: concurrent systemic azole antifungals may cause additive toxicity.
• CYP3A4 inhibitors: strong inhibitors (e.g., oral ketoconazole, itraconazole) can increase systemic absorption leading to hepatotoxicity.

Moderate Interactions (Monitor Closely)

• Topical steroids: may mask signs of infection, requiring monitoring.
• Warfarin: ketoconazole may enhance anticoagulant effect, necessitating INR checks.
• Oral contraceptives: possible reduction in efficacy, advise alternative contraception.