How effective are nonprescription tar preparations for the treatment of psoriasis?

Updated: Mar 17, 2021
  • Author: Jacquiline Habashy, DO, MSc; Chief Editor: William D James, MD  more...
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Answer

Nonprescription tar preparations are available and have therapeutic success, especially when used in conjunction with topical corticosteroids; the newer foams are less messy preparations than some of the older ones. Anthralin, tazarotene, salicylic acid, phenolic compounds, and calcipotriene (a vitamin D analog) also may be effective especially when used in combination with topical corticosteroids. Systemic corticosteroids are generally ineffective, and they can significantly exacerbate the disease upon withdrawal.


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