Medication Summary
The goals of pharmacotherapy for keratosis pilaris (KP) are to reduce morbidity and to prevent complications.
Retinoids
Class Summary
Retinoic acid decreases cohesiveness of follicular epithelial cells, stimulates mitotic activity, and increases turnover of follicular epithelial cells.
Tretinoin topical (Retin-A, Avita, Retin A Micro)
Inhibits microcomedo formation and eliminates lesions present. Makes keratinocytes in sebaceous follicles less adherent and easier to remove. Available as 0.025%, 0.05%, and 0.1% creams. Available also as 0.01%, 0.025%, 0.04%, and 0.1% gels.
Alpha-hydroxy acids
Class Summary
Normal constituent of tissues and blood. Act as humectants when applied topically and may decrease corneocyte cohesion.
Ammonium lactate lotion (AmLactin, Lac-Hydrin)
Indicated for treatment of ichthyosis vulgaris and xerosis. Contains lactic acid, an alpha-hydroxy acid that has keratolytic action, thus facilitating release of comedones. Causes disadhesion of corneocytes. Use 12% cream or lotion.
Topical skin products
Urea
Promotes hydration and removal of excess keratin in conditions of hyperkeratosis.
Available in 10-40% concentrations.
Hydroquinone and tretinoin (Solage)
Mequinol (hydroquinone) is a depigmenting agent theorized to cause cytotoxic products in melanocytes or inhibit melanin formation. Tretinoin is a retinoid, which also elicits depigmenting effect. Available as a topical solution combination product containing mequinol 2% and tretinoin 0.01%.
Keratolytic agents
Tazarotene (Tazorac)
Receptor-selective retinoid is a synthetic retinoid prodrug that is rapidly converted into tazarotenic acid. Because use of tretinoin often is hampered by its irritancy, this product may be advantageous. Available as 0.05% and 0.1% cream or gel.
Retinoid prodrug whose active metabolite modulates differentiation and proliferation of epithelial tissue; may also have anti-inflammatory and immunomodulatory properties.
Adapalene (Differin)
Modulates cellular differentiation, inflammation, and keratinization. May be tolerated by individuals who cannot tolerate tretinoin creams. A therapeutic response can be expected following 8-12 wk of therapy. Available as 0.1% gel or solution or 0.3% gel.
Corticosteroids, topical (medium potency)
Fluticasone (Cutivate)
Extremely potent vasoconstrictive and anti-inflammatory activities. Has weak inhibitory affect on HPA axis when applied topically.
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