“…Fortunately, this dilemma was only temporary, for i t was discovered subsequently that hydrocortisone and hydrocortisone 2 1-acetate produced pronounced anti-inflammatory responses when applied topically in a variety of inflammatous dermatitides (8-10). Hydrocortisone 21-acetate, but not the free alcohol, also was effective intradermally in improving local lesions of spontaneous disease or those induced experimentally by application of primary irritants, especially certain sensitizing agents (8)(9)(10)(11). The experimental and clinical proof that hydrocortisone and its 21-acetate derivative possessed appreciable topical anti-inflammatory activity marked the beginning of a new epoch in dermatology.…”