I took leflunomide for a few months about a year ago. It really helped my RA symptoms and I was very sorry when I had to stop taking it. The side effects, especially diarrhea, made it impossible to continue. Even after stopping it I had a reprieve from my worst symptoms. The fatigue which plagued me since first becoming symptomatic nearly vanished. And now, a year later and at least nine or ten months since stopping the drug, my fatigue isn't as bad as it was before I took it. Don't understand this at all. There may be no connection. It is great though. Sorry it isn't working for you!