Estrogens, including oral contraceptives: Estrogens may decrease the hepatic metabolism of certain corticosteroids, thereby increasing their effect. Hepatic Enzyme Inducers (e.g., barbiturates, phenytoin, carbamazepine, rifampin): Drugs which induce cytochrome P450 3A4 enzyme activity may enhance the metabolism of corticosteroids and require that the dosage of the corticosteroid be increased. Hepatic Enzyme Inhibitors (e.g., ketoconazole, macrolide antibiotics such as erythromycin and troleandomycin): Drugs which inhibit cytochrome P450 3A4 have the potential to result in increased plasma concentrations of corticosteroids. Ketoconazole: Ketoconazole has been reported to significantly decrease the metabolism of certain corticosteroids by up to 60%, leading to an increased risk of corticosteroid side effects.
Estrogens, including oral contraceptives: Estrogens may decrease the hepatic metabolism <br>of certain corticosteroids, thereby increasing their effect. <br>Hepatic Enzyme Inducers (e.g., barbiturates, phenytoin, carbamazepine, rifampin): <br>Drugs which induce cytochrome P450 3A4 enzyme activity may enhance the metabolism <br>of corticosteroids and require that the dosage of the corticosteroid be increased. <br>Hepatic Enzyme Inhibitors (e.g., ketoconazole, macrolide antibiotics such as <br>erythromycin and troleandomycin): Drugs which inhibit cytochrome P450 3A4 have the <br>potential to result in increased plasma concentrations of corticosteroids. <br>Ketoconazole: Ketoconazole has been reported to significantly decrease the metabolism <br>of certain corticosteroids by up to 60%, leading to an increased risk of corticosteroid side <br>effects.
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