usatoday.com — Drug companies are quietly pushing through price hikes of 100 percent — or even more than 1,000 percent — for a very small but growing number of prescription drugs, helping to drive up costs for insurers, patients and government programs. The number of brand-name drugs with increases of 100 percent or more could double this year from four years ago, researchers from the University of Minnesota say. Many of the drugs are older products that treat fairly rare, but often serious or even life-threatening, conditions. "This does drive up the price of health care," says Alan Goldbloom, president of Children's Hospitals and Clinics of Minnesota. "Hospitals are either eating the cost or passing it along to insurers, so you and I are paying it in increased premiums."