title: I have rheumatoid arthritis in my knee and have been receiving cortisone injections for several years. I'm concerned that there might be a limit on how many injections I can safely have in a year. Also, how many years can I take these injections?
mesh_terms: D000893:Anti-Inflammatory Agents / Q000008:administration & dosage*; D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D003348:Cortisone / Q000008:administration & dosage*; D006801:Humans; D007270:Injections, Intra-Articular / Q000009:adverse effects / Q000706:statistics & numerical data; D007719:Knee Joint; D017410:Practice Guidelines as Topic; D013997:Time Factors
chemical_list: D000893:Anti-Inflammatory Agents; D003348:Cortisone