over the last week I've posted two interesting articles on my web site http://www.mytherapypractice.com relating to drug companies and doctors and initiatives being taken by some doctors themsleves to change this. The information makes frightening reading - for example there's one drug rep for every 15 doctors in the USA - drug companies would not be paying them if they didn't think they were value for money.
Here's a site which explains why patients should be concerned and what they can do about it:
http://www.nofreelunch.org/patients.htm