Prednisoloneinteractions

Drugs such as barbiturates, phenytoin, ephedrine, and rifampin, which induce hepatic microsomal drug metabolizing enzyme activity may enhance metabolism of prednisolone and require that the dosage of Prednisolone Sodium Phosphate Oral Solution (10 mg Prednisolone per 5 mL), Prednisolone Sodium Phosphate Oral Solution (15 mg Prednisolone per 5 mL), Prednisolone Sodium Phosphate Oral Solution (20 mg Prednisolone per 5 mL) and Prednisolone Sodium Phosphate (25 mg Prednisolone per 5 mL) be increased. Increased activity of both cyclosporin and corticosteroids may occur when the two are used concurrently. Convulsions have been reported with this concurrent use. Estrogens may decrease the hepatic metabolism of certain corticosteroids thereby increasing their effect. Ketoconazole has been reported to decrease the metabolism of certain corticosteroids by up to 60% leading to an increased risk of corticosteroid side effects. Coadministration of corticosteroids and warfarin usually results in inhibition of response to warfarin, although there have been some conflicting reports. Therefore, coagulation indices should be monitored frequently to maintain the desired anticoagulant effect. Concomitant use of aspirin (or other nonsteroidal anti-inflammatory agents) and corticosteroids increases the risk of gastrointestinal side effects. Aspirin should be used cautiously in conjunction with corticosteroids in hypoprothrombinemia. The clearance of salicylates may be increased with concurrent use of corticosteroids. When corticosteroids are administered concomitantly with potassium-depleting agents (i.e., diuretics, amphotericin‑B), patients should be observed closely for development of hypokalemia. Patients on digitalis glycosides may be at increased risk of arrhythmias due to hypokalemia. Concomitant use of anticholinesterase agents and corticosteroids may produce severe weakness in patients with myasthenia gravis. If possible, anticholinesterase agents should be withdrawn at least 24 hours before initiating corticosteroid therapy. Due to inhibition of antibody response, patients on prolonged corticosteroid therapy may exhibit a diminished response to toxoids and live or inactivated vaccines. Corticosteroids may also potentiate the replication of some organisms contained in live attenuated vaccines. If possible, routine administration of vaccines or toxoids should be deferred until corticosteroid therapy is discontinued. Because corticosteroids may increase blood glucose concentrations, dosage adjustments of antidiabetic agents may be required. Corticosteroids may suppress reactions to skin tests.