I picked up prescription today for my son to start methotrexate injections tomorrow evening. After reading pamphlet that comes with it, I am very scared. He has a cough right now (no fever) and I see there is a potential for lung issues. I've asked the doctor's office and they said it's fine as long as he has no fever. I'm still really scared and questioning my decision---our other option was Remicade. I just feel so helpless as there doesn't seem to be any perfect treatment and I hate to pump these chemicals into his little body. Also, he feels fine so I am petrified that these drugs may make him not feel good. Can someone talk me through this?