You have to keep in mind how much influence a company like Pfizer can have on pdocs. You wouldn't think it would be that much but it actually is in a lot of cases. My brother in law was a drug rep for Pfizer and used to push Pristiq big time. I used to argue with him about why should I pay more for Pristiq when I can get generic Effexor. He made all his company line arguments to me but in the end he said there is no difference.