Recently FDA released data suggesting KPTI and myloma medicationi was too "Toxic" their MM chemo drug had SERIOUS toxicity AEs and even DEATH. Cohort of 123 pts ~86% had some sort of serious AE and ~24% dropped out because of this. to find out more about what happened and why SP dropped, see synopsis in the link below.
Synopsis of Data can be found here- opening bell 2/25/2018: msmoneymoves.com/