![]() ![]() Dosage calculation of topical corticosteroids (examples guide 1 FTU = 0.5 g) The fingertip unit (FTU) is a useful general guide for the amount of topical agent (Figure 1). The required dose (amount) is guided by location and extent of the lesion (Box 1). The advice of applying TCS agents ‘sparsely’ is no longer applicable instead, ‘liberally’ is encouraged. With regard to choice of TCS formulation, an ointment base is preferred for dry, scaly and mucocutaneous lesions (eg on the lips and genitals) cream for wet/oozing lesions and liquid (solution, lotion) for hairy areas (eg scalp), where cream or ointment is unable to reach the areas of affected skin. Some hypertrophic/hyperkeratotic lesions might also require a combined intralesional steroid injection, which is beyond the scope of this article. Note: Interchangeable choice of TCS with titration and response can be applied in some conditions as per description by factoring or specific local guidelines. ![]()
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