I was diagnosed with Psoriatic Arthritis in June last year, and have been on Methotrexate and Prednisolone for a year now. I had a cold earlier this year and that turned into a chest infection, and now, 20 weeks later, I still have a cough. I saw my GP last week and he ordered a chest xray and lung function test, as he is worried about me possibly having developed Pulmonary Fibrosis. Has this happened to anyone else while they've been taking Methotrexate? Would anyone like to chat sometime about P.A. in general? My hubby of only two years must be getting sick of me complaining... It'd be nice to talk to someone who's going through something similar.