Hi Mixmez! It is possible for methotrexate to cause damage to the lining of the lungs (as I understand it), so if you experience any trouble breathing (coughing, wheezing, shortness of breath, etc.) you should definitely get in to see your Rheumatologist or PCP ASAP. Is this a new symptom, or something you have experienced before?
Please take good care of yourself, we are thinking about you.
-Victoria, Community Moderator