Hi Matt,
I've recently come off Aza or Imuran - I couldnt handle the side effects - nausea, head aches, hair falling out, bones hurting, stomach cramps, diarreah...
It was the worst 10 weeks on any medication I've ever had! I took 150mg by the end but then my specialist nurse took me off it as she didnt like all the side effects I was experiencing...and my blood imflammation was quite high as well as my ESR...
Anyway I guess I just want to say that dont be afraid to tell your specialist that you dont like the medication and that you want to know other routes you can go down...however your sickness could taper off eventually, maybe try taking the 100mg but 50mg after breakfast and 50mg after your tea, spreading it out a bit? It does seem tpo be working for you - trust your instincts and also gain advise from your doctor...
Hope all goes well and good luck :)