Thanks Jtwin
I am looking for reasons to stay on his drug - but remembering that should the worst happen my DH will be the one taking care of me.
I think I will suggest another test (my level was based on a test in 2012) and maybe a longer interval between infusons will help.
I am so paranoid about the other drugs - they all seem to have diarrhea as a side effect - and I seem to have enough trouble not 'disgracing myself' as it is - without promotion

.