I've finally managed to see a respiratory specialist and I'm starting to get answers about my breathing problems. It's definitely not looking like the cause is infectious. Anyway, he asked if I'd had lung function tests prior to starting methotrexate. I hadn't. The only tests I had were an x-ray and TB blood test before starting anti TNFs. I'd been on MTX for 2 years at this stage. The consultant suggested that people should be having these tests to establish a baseline before starting on MTX and then again before biologic treatment if lung function hadn't checked for a while. This got me thinking and I am interested to hear your response.