Patients who want an injectable form of Roche Holding AG’s bone-strengthening drug Boniva may not be able to get it in the next few weeks because the company did not accurately forecast demand, federal officials said. A mismatch between company forecasts and actual demand is one of the many reasons medicines can go into shortage, especially when there is only one company making them. The number of cancer, anesthetic and other drugs in short supply in the United States hit a record high last year with 250 medicines, largely due to manufacturing problems.