I had codeine induced constipation before. Literally no movement for 2+ weeks.
It was as bad as you can imagine. Painful and uncomfortable. Caused dehydration which led to severe whole body muscle spasms. I thought I had impacted bowels at one point.
Fearing I would vomit shyt (that's a real thing for those who don't know).
fukked up part was, I wasn't even abusing the meds, just took them too long on top of drinking less water.
Now whenever I take them, I have to eat prunes and have laxatives on deck just in case.
I appreciate daily shyts more than most people because of that experience.