Topical Antifungals

Topical Antifungals

  • There are several classes of topical antifungal medications
  • Some classes are fungistatic (stop fungi from growing), others are fungicidal (they kill the fungi)
  • Not all conditions are treatable with topical antifungals (specifically, hair infections and nail infections do not respond to topical treatment and require systemic treatment)

Examples of Topical Antifungals

  • The following are some examples of topical antifungals:
    1. Imidazoles (fungistatic): Ketoconazole (Rx & OTC), Econazole, Oxiconazole, Sulconazole, Clotrimazole (Rx & OTC), Miconazole (OTC)
      • Useful to treat candida and dermatophytes
    2. Allylamines and benzylamines (fungicidal): Naftifine, Terbinafine (OTC), Butenafine
      • Better for dermatophytes, but not candida
    3. Polyenes (fungistatic in low concentrations): Nystatin
      • Better for candida, but not dermatophytes

Advantages of Topical Antifungals

  • Topical antifungals are preferred for most superficial fungal infections of limited extent.

  • Advantages include:

    1. Relatively low cost
    2. Acceptable efficacy
    3. Ease of use
    4. Low potential for side effects, complications, or drug interactions

Take Home Points

  • The efficacy of any topical medication is related to the strength, location, vehicle, and concentration
  • Topical medications can be very expensive
  • When writing a prescription for a topical medication, include: generic name, vehicle, concentration, directions, amount, # of refills
  • Corticosteroids are organized into classes based on their strength (potency)
  • Skin atrophy, acne, striae, and telangiectasias are potential local side effects of corticosteroid use