Interesting but not related to the drug treatment theme of this thread, Epi.
It is surprising how many different responses to the same drug can be seen. Some of that is due to the lack of specific targets for the drugs to be delivered to - aim at nothing in particular, and you'll often hit it.
That's why I like research which tries to discover better ways of delivering drugs to specific targets - like some of find-a-drug's projects, for example.
If we can get the drugs delivered directly to the target cells it will make a lot of difference about how many ppl actually benefit from the drugs.
Cheers
Mick