question: Hi i am a 43year old woman with psoratic arthritis i take metotrexate weekly for almost 3years it works for arthritis but i have had continuos chest infections,  peumonia twice in six months and have also developed asthama, my lung function tests are reading at only 43% and im worried i will have long term lung damage.I feel it is time for my consultant to treat my arthritis with another drug which may not be as difficult for my lungs to deal with. Do you think my lung problems are connected with the metotrexate.