Thus, topical calcipotriene may be used as an alternative or adjunct to topical corticosteroid therapy. It is applied twice daily when used as monotherapy. No controlled trials guide how best to use topical corticosteroids in conjunction with calcipotriene. Once daily use of each may be adequate. Acidic products can inactivate topical calcipotriene, and some topical corticosteroids may be acidic. A reasonable approach to combination therapy is to have patients apply topical calcipotriene and topical corticosteroids each once daily at different times of day.