Right now I am on 30 mg. I was on 80 mg for a month and half. Before the 80 mg I had 3 IVs' of Solu-Medrol of 1000 mg each. Here is a link with all the possible drug reactions that prednisone can cause http://www.drugs.com/drug_interactions.php
Hope this Helps! The list is rather long! How much prednisone are you currently taking?