I like a six compartment pillbox, hard sided, because meds are hard to improvise.
I'm always surprised about the amount of medications in American FAK's. A pack of pain killers is as much you will find in any European one's. I rarely feel the need to use medication. For example i'm pretty sure i have taken less then 10 pain killers in my life. I have only carried some pain killers, ORS salts and diarrhea pills in my FAK's.