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  • Title: Adrenocortical suppression in the dog after a single dose of methylprednisolone acetate.
    Author: Kemppainen RJ, Lorenz MD, Thompson FN.
    Journal: Am J Vet Res; 1981 May; 42(5):822-4. PubMed ID: 6266293.
    Abstract:
    Adrenal function was assessed in dogs after intramuscular administration of a single dose of methylprednisolone acetate (MPA). Twelve dogs were test challenged with adrenocorticotropic hormone (ACTH) and then assigned randomly to 1 of 3 groups and given MPA. Individual groups were test challenged with ACTH 2, 3, or 4 weeks later. All dogs were rechallenged 5 weeks after MPA administration. Plasma cortisol concentration was determined by radioimmunoassay. Basal plasma cortisol (time 0) was depressed on weeks 2 and 3, but not on weeks 4 and 5. Adrenal response to ACTH (increment of cortisol change) was suppressed on weeks 2, 4, and 5, but not on week 3. It was concluded that a single dose of MPA is capable of altering adrenal cortical function in dogs for at least 5 weeks.
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