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Penlac (ciclopirox) is a prescription antifungal nail lacquer used to treat mild-to-moderate onychomycosis, a fungal infection of the fingernails or toenails. It is applied directly to the affected nail and surrounding skin once daily.

Apply Penlac to the entire affected nail surface and the skin immediately surrounding it once daily, ideally at bedtime. Once weekly, remove the accumulated layers of lacquer with alcohol before reapplying. Consistent daily use over several months is necessary for best results.

Nail fungus treatment requires patience. Clinical studies typically involve 48 weeks of treatment. Because nails grow slowly, visible improvement in nail appearance may take several months. Your physician will monitor your progress and advise on treatment duration.

The most commonly reported side effects are local reactions at the application site, including redness, rash, burning, or itching around the nail. Serious systemic side effects are rare because very little of the medication is absorbed through the nail into the bloodstream.

Penlac is considered most effective for mild-to-moderate nail fungus that does not involve the base of the nail. For more severe or widespread infections, your physician may recommend combining Penlac with an oral antifungal or switching to a systemic therapy.

Yes. Penlac is approved for use on both fingernails and toenails in adults. Toenail infections are generally more stubborn than fingernail infections and may require a longer course of treatment.

Doctronic uses an AI-powered evaluation to gather information about your symptoms and medical history. A licensed physician then reviews your case, and if appropriate, creates a personalized treatment plan that may include a prescription.

Yes. Doctronic connects you with fully licensed physicians whose consultations are doctor-reviewed and audited for quality. The platform is HIPAA-compliant, and your health information is kept private and secure.