When I was diagnosed in 2017, my rheumatologist warned me of the risk of developing another condition called Sjogren with taking methotrexate which is said to be the first line of defense with RA. Her description was vague. Something like, you might notice some dry mouth. But No, every outside part of your body that secrets or holds any type of moisture is affected. All your wet parts will dry and the dryness in its self causes its own set ailments like the dryness in the mouth, can cause it to be sore. Also dry mouth promotes bad breath and tooth decay. Dry Eyes can create visual disturbances amongst other things. And even Vag dryness, hair, skin.
I was also told that most people with RA develop certain types of GI conditions.

I thought I was the only one having dry mouth but I ve read that it is caused by taking methotrexate