more meds to take

Hi there folks, I am pretty new to living with RA only since Nov 2008.  I have been taking Methotrexate since December 2008 slowly increasing from 7.5mg to 20mg which I am taking now.  I went to visit my Rheumie last week he said that my bloods havn`t changed much and my RA is still active, (well I could have told him that!) I also take diclofenac anti inflammatories and tramadol for the pain, oh and folic acid to counter act the side effects of the MTX.  He has also said that I am very anaemic so he has prescribed me iron tablets, (which I don`t really want to start taking because of the constipation side effects!) He then says that he wants to introduce Leflunomide in the next 4 weeks.  Does this sound pretty much how it goes?? and can anyone tell me about Leflunomide.

Cheers Angie