I have used the mtx injection and they are a lot easier on the tummy.  The nausea was more tolerable. The formula for mtx is just yucky period.  Only way around it is to not use it.  After years of my complaining they finally invented Arava for me.. LOL. It is a daily dose and has not given me any side effects at all.  I love it and would willingly become a spokes person for it should they ask.  LOL   I do recomment the Tai Chi.  Unlike yoga there is not floor exercises.  And you would be surprised at how much work your muscles go through to move extremely slowly and methodically.  I love it.  I took Karate classes as a child and Tai Chi is the closest I can come to keeping up with those techniques.    Sorry by my spelling sucks today.  I think.  I dunno if I am spelling this stuff right or not..LOL