Christine
The link below is worth reading. There were 2 trials FIT1 & FIT2, which showed only 18% of participants achieved a stable response.
I was part of the FIT2 trial 5 years ago. For the first 8 weeks I could have been on a placebo as it was a randomised controlled trial, but for the remainder I took the real thing, initially at 100mg twice a day for 4 weeks and then 150mg twice a day for the remaining 14 weeks and saw no benefit from it at all. Mind you I had no side effects either. Another lady at my clinic was also on the trial. She had a slight response but unfortunately it did not last.
ashpublications.org/blood/article/133/19/2027/273805/Fostamatinib-for-the-treatment-of-chronic-immune