I take it at night. I've only been on it for about
6 weeks. No side effects until around the 4 week point. Tired, nauseous occasionally, liver enzymes up a little - not much.
I haven't really been on it long enough to rate it - but it allowed me to get off prednisone.
If you're just starting it, or considering, make sure you keep up with the labs. It's a pain, but important. Mine were also weekly, then 2x/month, etc.