I think Melissa D. takes Arava - otherwise it looks like some HW members on the RA forum have experience with it. (Choose SEARCH, on the right hand side of the second blue bar from the top to find the posts referencing Arava.)
I don't think any Drs have good answers for vertigo, so I wouldn't replace him just for that, but if you aren't happy in general there is no shame in getting a second opinion. You can do that and still go back to your existing Dr if the 2ond doesn't give you a good feeling.
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2000DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde