Irradiation of the skin resulted in a highly significant increase in erythema values. After 24 h, only the treatment with prednicarbate (Dermatop cream) followed by Dermallerg-Ratiopharm cream 1% efficiently reduced the erythema. On the nonirradiated sites, a typical blanching effect of the glucocorticosteroids could be observed. The A. vera gel (97.5%), the placebo gel but also 1% hydrocortisone in placebo gel did not show a significant effect 24 h after irradiation ( fig. 3 ).