Potentiated by CYP3A4 inhibitors (eg, ketoconazole, macrolides), cyclosporine, estrogens. Antagonized by CYP3A4 inducers (eg, barbiturates, phenytoin, carbamazepine, rifampin), cholestyramine. May potentiate cyclosporine (seizure risk). May antagonize oral anticoagulants (monitor), isoniazid. Increased risk of arrhythmias with digitalis. May need to adjust dose of antidiabetic agents. Monitor for hypokalemia with potassium-depleting drugs (eg, amphotericin B, diuretics). Concomitant neuromuscular blocking agents; increased risk of myopathy. Withdraw anticholinesterase agents at least 24hrs before initiating corticosteroid therapy. Aminoglutethimide may lead to loss of corticosteroid-induced adrenal suppression. Increased GI effects with aspirin, other NSAIDs. Caution with aspirin in hypoprothrombinemia. May suppress reactions to skin tests.
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Inform your physician of all the medications you take (prescription and over the counter) and other medical conditions you have before taking a Medrol Dose Pack. If you are scheduled for surgery, the medical staff must be aware that you are on a Medrol Dose Pack. It never should be taken if you are allergic to methylprednisolone or have a fungal infection. Since steroids can weaken the immune system, avoid people who have colds and the flu. Contact your physician if you become exposed to the measles or chicken pox, as these illnesses can become serious when a person is on steroid medication.