I feel like it is just knowing everything (SEs, mechs, toxicities, uses for some drugs) because probably 80-90% of the pharm questions I miss, I flip to the section in FA and see that the info needed to answer the question is listed right there and I just didn't remember it. Of course, 10-20% of the time, the info is nowhere to be found, so the only way I ever get those ones right is process of elimination.