I was diagnosed with RA about 8 - 9 years ago. So far the drugs they have me on have contained the disease where I am relatively normal. Nobody that sees me play would know I had it unless I had a flair up. I have flair ups now and then but they are managed through some short term steroids and generally go away pretty quickly.
I now take Enbrel, which is a once a week self-injection, which has been working very well. I have not experienced any side-effects with the use of enbrel but I believe it is safe for the liver. Some of the drugs they prescribe for RA are very harsh on the liver (methotextrate).
However, I hope you have insurance because Enbrel can be very expensive ($400 per Shot).
Also, I discovered something about 3 years ago, which I knew nothing about. In addition to attacking your joints, RA can also attack the back of your eyes, "freezing" your muscles keeping your pupils open/dilated.
This condition is called "Uveitis." Therefore, if you start having issues with your eyes (sensitivity to sunlight, red, eyeball hurting or feeling pressured; almost like being squeezed), you should go see an opthamologist ASAP.
I didn't and an Optometrist could not detect it; they thought it was irritation from my contacts. Therefore, because I was not aware of this condition, I was in pain for about 3 months before finally being diagnosed. There was no long term damage; however, you want to get it taken care of as soon as possible.