I just looked up the Warnings and Precautions section for Methotrexate at
www.rxlist.com (
http://www.rxlist.com/cgi/generic/mtx_wcp.htm ). That is serious and scary stuff. If I were in your situation, I think I'd also not take Methotrexate for other than seriously debilitating or life threatening conditions.
It seems wise to me to look up and understand the side effects and risks of every drug one takes to weigh risks vrs. benefits. Negative consequences are far more serious for us patients than for the prescribing physician.