It depends on the medicine! For example, I have a medicine that I take regularly, and to reduce the amount of doctor visits, my doctor just prescribes me several months of medicine in one giant box.

The box contains smaller boxes of the medicine and they all come with the same description paper - all 30 boxes! I have read that paper 100 times already, there is no need for me to read it anymore.

Most people take familiar medcine. I won't read the instructions in the n+1th pack of ibuprofen I'm buying.

Kind of yes, but you usually either a) get instructions from the doctor, or b) have already read the instructions for this drug before.

Instructions? Sure. But those inserts also can include lots of information on pharmacokinetics and far more technical details about the drug's method of action.

I need to know when/how to take the drug, for how long, and what side-effects to look out for. Basically the rest is irrelevant to me.