>If the change doesn't actually result in a therapeutic benefit, then doctors shouldn't prescribe the new drug over the generic. For various reasons, doctors ha

>If the change doesn't actually result in a therapeutic benefit, then doctors shouldn't prescribe the new drug over the generic. For various reasons, doctors have little incentive to do that. The main thing is that neither the doctor nor the patient are paying for the drug. When you're not paying, you have no incentive to prescribe the "older model." The golf trips, lunches from drug reps, free samples for poor/indigent patients, and speaking fees paid from drug companies to doctors sure doesn't hurt either.