Can i halve Champix after 10 weeks?

Successfully and happily a non smoker after 10 weeks of Champix :) (was a heavy smoker for 20+ years)

I have another 2 weeks of pills to go... and am wondering what happens with life after Champix?! For this reason I want to know if I am able to start halving my dosage to wean myself off the drug as well as not suddenly stop of the allocated time/ date?

Has anybody tried this ? Much appreciated :)