Food and Oxycodone Opiates, especially oxycodone which is common, causes constipation. Fats consume large amounts of oxycodone and food causing them to be constipated which causes pain and discomfort. I wonder how fats are able to eat so much food despite literally being full of shit from consuming all that oxycodone and opiates? Do they just let shit slide out or something? I'm curious to know how they can consume so much opiates and food despite being severely constipated. Like how do they managed to do that?