The evidence for their use is strong.
Medicine generally tends not to extend life. It's got it's place when one get's mangled up on the M6, put apart from that, there are only a few occasions when it actually makes much of a difference.
Immunisations work well, the "golden hour" saves a few lives, and fiddling about with peoples blood pressure/sugar levels may make a bit of a difference.
The other stuff we spend your money on could perhaps be spent on other areas.
Statin's however, seem to save lives. The odd recipient may suffer liver problems/ muscle problems, but in reality I haven't seen much evidence of this, and nowadays, the monitoring we use, seems to pick these problems up quickly.
They do seem to have a "magical" effect that we perhaps don't understand just yet.
Should we just tip them in the water?