A battle for profits between two arms of the health-care industry has made privately insured patients into pawns, offering them a growing number of discounts on their drug co-pays while ultimately leaving them with fewer drug options overall, according to a new analysis. The research, funded by Pfizer, found that the number of coupons that drug companies offer to help defray the portion that insured patients pay for their drugs has exploded. At the same time, the companies th