I have Rheumatoid Arthritis, which is a autoimmune. But my Reumatologist, Lympedema specialist and the WLS team all say its for the best.
Just have to wait and see about my tablets for Rheumatoid, also I have a 7 day Morphine patch on which will be ok to keep.
I have asked about the deficiencies, and they said "They wouldn't do the operation if it wasn't safe"