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  • Title: Adrenocortical suppression in dogs on daily and alternate-day prednisone administration.
    Author: Chastain CB, Graham CL.
    Journal: Am J Vet Res; 1979 Jul; 40(7):936-41. PubMed ID: 507496.
    Abstract:
    Three groups of eight normal dogs each were orally given prednisone at doses of 0.22 mg/kg of body weight/day, 0.55 mg/kg/day, or 1.1 mg/kg on alternate mornings. Four dogs served as nontreated controls. Samples were obtained from members of each group to determine baseline serum cortisol and ACTH-stimulated cortisol values and histologic features in the lateral thoracic skin before prednisone administration, and after 1, 2, 3, and 4 weeks of administration. Some animals from each group were necropsied after 1, 2, 3, and 4 weeks of prednisone administration. Each course of prednisone administration resulted in adrenocortical atrophy and hypofunction, but adrenocortical suppression was less severe and slower in onset in the group given prednisone on alternate days. Extra-adrenal effects observed were atrophy of the skin and focal, fatty change of the liver. These changes were most evident in dogs given daily pharmacologic doses of prednisone (0.55 mg/kg/day). Fewer extra-adrenal effects were observed in dogs given alternate-day therapy. There were no extra-adrenal lesions in the dogs given equivalent glucocorticoid replacement doses (0.22 mg/kg/day).
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