Glucocorticoid. Substrate, inhibitor and activator / stimulator of CYP 3A4. Several references consider it safe.

Glucocorticoid for intramuscular administration or local injection. Metabolized by CYP 3A4. Glucocorticoids: South African list: use. French list: authorized. Kalman, Bonkowsky: probably safe Michael Moore's list: safe. The Merck Manual: safe. Tschudy DP, Lamon JM: Porphyrin metabolism and the Porphyrias in Bondy BK, Rosenberg LE (eds): Duncan’s Diseases of Metabolism, Philadelphia, WB Saunders. 1980,p 939. :safe. Moore MR, Hift RJ: Drugs in acute porphyria. Cell Mol Biol 43:89, 1997:safe