I'm in my 30's. I have a similar experience with Guest #17721 posted Mon, 13 Feb 2006 with MethylPRED 4 mg on chest pain. Day 3 to 4, my neck & back muscles started aching. On Day 4, I felt easily angered and my heartburn feeling started. I ignored the slight discomfort thinking it was just stress related. Became concerned on Day 5 when the heartburn discomfort lingered, my right leg feels numb. I feel it was very likely induced by MethylPRED. I took 2 Asprins to ease the discomfort. I'll call my doctor tomorrow morning.