my soapbox
I work in biotech, and have worked for a drug company in the past (research) . Some time you just scratch your head when you see what goes on in the clinical area!
Trust me when I say that a lot of studies' conclusions are very questionable when you really look at them. There was a big one (it made it to the mainstream press) on statins a few years back where the conclusion was everyone would benefit from taking them (I'm stretching here, but you get the idea). They had cherry picked their subjects based on high levels of c reactive protein (inflammation marker implicated in heart disease), but then drew conclusions to everyone. Obviously, a drug company wants as many people as possible to buy their products so they aren't exactly impartial.
My big thing is that when you take a drug for a chronic condition (ie. you will take it until you die), be very careful and do your own research. If that means reading journals and such, then so be it. Of course, the internet can be dangerous for that as well, so watch your sources. Also, what passes as safety in a 90 day to 1 yr study is not the same as 20yrs! We have to be gatekeepers of our own health, with the help of good doctors.