Probably insignificant systemic exposure. Several references stating non-porphyrinogenicity of glucocorticoids.

(To be edited, initial data ST OCT 04) Glucocorticosteroid used (400-800 ug/d) in asthma. Not significantly absorbed from lung or gastrointestinal channel. Metabolized by CYP 3A4. glucocorticoids EPI-list: safe South African list: use Kalman, Bonkowski: safe The Merck Manual: safe Tschudy DP, Lamon JM: Porphyrin metabolism and the porphyrias, in Bondy PK, Rosenberg LE (eds.): Duncan's Diseases of Metabolism. Philadelphia, WB Saunders, 1980, p939: safe Moore MR, Hift RJ: Drugs in the acute porphyrias. Cell Mol Biol 43:89, 1997: safe