I am on day one of I co codimol withdrawal and it coincides with my quit smoking day (14th day in champix) at least it makes quitting smoking a lot easier .i feel flue like and have severe aches and pains.like everyone else I've been getting 224 tabs on prescription for a back injury . I want to really know how long it takes to flush out of my system .i don't mind taking two tabs a day as I in pain still but don't want to take 20 to 30 a day like I was combining with 4 nurofen plus Aswell . Any advice would be great