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.
The National Heart, Lung, and Blood Institute (NHLBI) recommended dosing for systemic prednisone, prednisolone, or methylprednisolone in pediatric patients whose asthma is uncontrolled by inhaled corticosteroids and long-acting bronchodilators is 1–2 mg/kg/day in single or divided doses. It is further recommended that short course, or "burst" therapy, be continued until the patient achieves a peak expiratory flow rate of 80% of his or her personal best or until symptoms resolve. This usually requires 3 to 10 days of treatment, although it can take longer. There is no evidence that tapering the dose after improvement will prevent a relapse.