I am prescribed 600 mgs every 8 hours for pain. It is quite effec...

I am prescribed 600 mgs every 8 hours for pain. It is quite effective but not very effective for EXTREME pain like I experience, so I often have to take a little more than prescribed every 8 hours. I have noticed that it gives me diarrhea and upsets stomach. You must eat with this medication unless you want to ruin your stomach. This makes it kind of difficult because if you have to take it over a period of time, you're bound to have to get up at 3 or 4 am to take it and not everyone wants to eat something at 4 am.