Please, take a look at the place of can be below. Which one is gramaticall? What about using of Patience or illness?
1) How effective can pill AA be for Janes's patience?
2) How effective pill AA can be for Janes's illness?
Thanks for your time!
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Therefor, "How effective can pill AA be for Jane's illness?" is grammatical, isn't it?