Stay away from study 8420-041- 2b . I am in 2a and everyone is getting sick. I never get sick from a study drug, have done over 30 studies. Yesterday post-dose was one of the worse days of my life and i'm still not all the way better. If I could go back I would not even do this study for $400/day let alone the low $255 they are paying. Highly recommend you stay away from this one.