Im so sorry to hear this, Ive not heard of RA causing this and Im not aware of the drug you mentioned as Ive never needed to take it. I hope someone comes along and can help you with answers. In the meantime, have you googled the med and RA? Or tried one of the medical sites? Was there no further information from the hospital other than what you stated? Im sorry I just find this incredibly shocking and am so sorry for you.
Please keep us posted.
Current meds: Methotrexate, Prednisone