The trouble with drugs is that if you start using them regularly when you don`t need them then you can eventually build up a `body tolerence` to them. We have all been told of the problems caused by overprescribing of antibiotics, and indeed the same thing happens with most other drugs - take enough of them and they no longer work anything like they should.
I can foresee a generation of who`ve been happily scoffing the little blue pills since their 30s, and suddenly find in their 50s or 60s that they don`t have any effect any more and that all those anticipated happy years of punting in their retirement just ain`t going to happen after all.